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<div class="noeditbox">Welcome to [[Pathophysiology of Complex Patient Problems|PT 635 Pathophysiology of Complex Patient Problems]] This is a wiki created by and for the students in the School of Physical Therapy at Bellarmine University in Louisville KY. Please do not edit unless you are involved in this project, but please come back in the near future to check out new information!!</div><div class="editorbox">
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'''Original Editors '''- [[Pathophysiology of Complex Patient Problems|Students from Bellarmine University's&nbsp;Pathophysiology of Complex Patient Problems project.]]  
'''Original Editors ''' - [[Pathophysiology of Complex Patient Problems|Students from Bellarmine University's Pathophysiology of Complex Patient Problems project.]]  


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== Definition/Description ==
== Introduction  ==
[[Image:Severe cellulitis.jpg|250x200px|thumb|Severe case of cellulitis]]
Cellulitis is a common [[Bacterial Infections|infection]] of the dermis and subcutaneous tissues. Cellulitis typically presents with pain, erythema, [[Oedema Assessment|oedema]], and warmth. Cellulitis is not transmitted by person-to-person contact as the epidermis is not involved.<ref name=":1">Radiopedia [https://radiopaedia.org/articles/cellulitis Cellulitis] Available:https://radiopaedia.org/articles/cellulitis (accessed 29.1.2023)</ref> If correctly identified and treated promptly with appropriate antibiotic treatment is usually resolves.<ref name=":2">Brown BD, Watson KL. [https://www.ncbi.nlm.nih.gov/books/NBK549770/ Cellulitis]. InStatPearls [Internet] 2022 Aug 8. StatPearls Publishing.Available:https://www.ncbi.nlm.nih.gov/books/NBK549770/ (accessed 29.1.2023)</ref>
=== Etiology ===
[[Image:Cellulitis and lymphedema.JPG|400x400px|alt=|thumb|Cellulitis and lymphedema]]The [[skin]] is a protective barrier that stops normal skin flora and other microbial pathogens reaching the subcutaneous tissue and [[Lymphatic System|lymphatic system]]. If a skin breakage occurs normal skin flora and other [[Bacterial Infections|bacteria]] can enter the dermis and subcutaneous tissue, leading potentially to an acute infection affecting the deep dermis and subcutaneous tissue. Cellulitis most commonly results from infection with group A beta-hemolytic streptococcus (i.e., ''Streptococcus pyogenes'').<ref name=":2" />


Cellulitis is a '''localized bacterial skin infection''', which typically affects the lower limbs but can occur on any area of skin and underlying subcutaneous tissue &amp;nbsp;It is characterized by acute onset of&amp;nbsp;'''redness, inflammation, pain, and swelling '''of the affected area. Accompanying symptoms include generalized fever, rigors, nausea, and vomiting.<ref name="Mason">Mason JM, Thomas KS, Crook AM, Foster KA, Chalmers JR, et al. Prophylactic Antibiotics to Prevent Cellulitis of the Leg: Economic Analysis of the PATCH I and II Trials. PLoS ONE. 2014;9(2):e82694 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0082694 (accessed 28 Feb 2017).</ref><br>  
Risk factors for cellulitis include: skin injuries; surgical incisions; [[Intravenous Lines|intravenous site]] punctures; fissures between toes; insect and animal bites; other skin infections; patients with [[Multimorbidity|comorbidities]] such as [[Diabetes Mellitus Type 2|diabetes mellitus]], venous insufficiency, [[Peripheral Arterial Disease|peripheral arterial disease]], and [[Lymphoedema|lymphedema.]]<ref name=":2" />  
== Epidemiology  ==
Cellulitis is relatively common, occurring often in middle-aged and older adults. Men and women, have a similar incidence of cellulitis. There are approximately 50 cases per 1000 patient-years<ref name=":2" />


The infection is most commonly caused by B-Hemolytic Streptococci bacteria and reoccurs up to 50% of the time in the lower extremity.<ref name="Tsai" />&nbsp;Most individuals diagnosed with cellulitis have a low risk of severe complications but few suffers can have severe sepsis, local gangrene, and/or necrotising fasciitis.<ref name="Mason" />  
== Pathophysiology ==
Cellulitis takes place after the skin is disrupted and microorganisms invade the subcutaneous tissues. Most commonly the infective agent is beta-haemolytic streptococci (most often) or staphylococcus aureus (including [[Methicillin-Resistant Staphylococcus Aureus|methycillin-resistant]]). <ref name=":1" />


[[Image:Mild cellulitis.jpg|center|250x200px]]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; A mild case of cellulitis<ref name="Medscape">Medscape. Cellulitis. http://emedicine.medscape.com/article/214222-overview (accessed 27 Feb 2017).</ref>
== Clinical Presentation  ==


[[Image:Severe cellulitis.jpg|center|250x200px]]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;A severe case of cellulitis that developed under a cast<ref name="Medscape" /><br>  
[[Image:Classic celulitis.PNG|thumb|A classic presentation of cellulitis: poorly demarcated erythema<ref name="Bailey">Bailey E, Kroshinsky D. Cellulitis: Diagnosis and Management. Dermatologic Therapy. 2011;24:229–39.http://onlinelibrary.wiley.com/doi/10.1111/j.1529-8019.2011.01398.x/full  (accessed 15 Mar 2017).</ref> |258x258px]]Typical symptoms of cellulitis include acute poorly demarcated and spreading erythema along with pain, swelling, and warmth. Commonly affects a lower limb but can occur on any area of skin or underlying subcutaneous tissue.<ref name="Tsai">Tsai C-YL, Calvin MK, Chung C, Susan Shin-Jung L, Yao-Shen C, Hung C. Development of a prediction model for bacteremia in hospitalized adults with cellulitis to aid in the efficient use of blood cultures: a retrospective cohort study. BMC Infectious Diseases. 2016;16(1):581.</ref><ref name="Raff">Raff AB, Kroshinsky D. Cellulitis: A Review. JAMA. 2016;316(3):325-37. http://jamanetwork.com/pdfaccess.ashx?url=/data/journals/jama/935437/ (accessed 27 Feb 2017).</ref>&nbsp;Regional lymphadenopathy and lymphangitis may be present alongside systemic features such as [[Fever|fevers]] and rigors.<ref name=":1" />
== Examination ==
Patients with cellulitis will reveal an affected skin area typically with a poorly demarcated area of erythema. The erythematous area is often warm to the touch with associated swelling and tenderness to palpation. The patient may present with constitutional symptoms of generalized malaise, fatigue, and fevers.
* Ask for a complete history of the presenting illness, focusing on the context in which the patient noticed the skin changes or how the cellulitis began to occur.
* It is essential to ask patients if they: recently traveled, experienced any trauma or injuries, have a history of intravenous drug use, and/or have had insect or animal bites to the affected area.
* A complete and thorough past medical history should additionally be conducted to evaluate for possible chronic medical conditions that predispose patients to cellulitis, such as [[Diabetes|diabetes mellitus]], venous stasis, [[Peripheral Arterial Disease|peripheral vascular disease]], chronic tinea pedis, and [[Lymphoedema|lymphedema]]. Diabetes Mellitus is one of most common comorbidities among those hospitalized for acute bacterial infections including cellulitis.  Following a cellulitis infection, those with diabetes require a longer course of antibiotic therapy and are more likely to have an outpatient follow-up visit.<ref>Jenkins TC. Comparison of the Microbiology and Antibiotic Treatment among Diabetic and Non-Diabetic Patients Hospitalized for Cellulitis or Cutaneous Abscess. J Hosp Med. 9ADADDec12;:788–94.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4256165/ (accessed 28 Feb 2017).</ref>.<ref name="Riches">Riches K, Keeley V. Cellulitis in patients with chronic oedema. Nursing &amp; Residential Care [serial on the Internet]. (2012, Mar), [cited March 31, 2017]; 14(3): 122-127. Available from: CINAHL with Full Text.</ref>
* Inspected area to look for any area of skin breakdown. The area should be demarcated with a marker to monitor for continuous spread. The area should be palpated to feel for fluctuance that could indicate the formation of a possible abscess.
* Gently palpate the affected area, be sure to note any presence of warmth, tenderness, or purulent drainage.
* Cellulitis can present on any area of the body, but most often affects the lower extremities. It is rarely bilateral. 
* In lower extremity cellulitis, careful examination between interspaces of the toes should take place.
* Check for proper sensation and verify pulses are intact to monitor closely for compartment syndrome. 
* Note if there are developing vesicles, bullae, or the presence of peau d'orange and lymphadenopathy.<ref name=":0">Brown BD, Watson KL. [https://www.ncbi.nlm.nih.gov/books/NBK549770/ Cellulitis]. InStatPearls [Internet] 2019 Nov 6. StatPearls Publishing. Available from:https://www.ncbi.nlm.nih.gov/books/NBK549770/ (last accessed 12.2.2020)</ref>


== Prevalence  ==
== Diagnosis ==


*650,000 hospital admissions per year in the United States are due to cellulitis.<ref name="Raff">Raff AB, Kroshinsky D. Cellulitis: A Review. JAMA. 2016;316(3):325-37. http://jamanetwork.com/pdfaccess.ashx?url=/data/journals/jama/935437/ (accessed 27 Feb 2017).</ref>
Cultures is most commonly diagnosed by&nbsp;history and physical examination alone. Two of the four criteria (warmth, erythema, edema, or tenderness) are needed for diagnosis.<ref name=":2" />  
*When hospitalized, patients with recurrent cellulitis require longer hospitalizations relative to nonrelapsing cellulitis patients.<ref name="Raff" />  
== Medical Management  ==
*From 1998-2006, '''10% of all infectious-disease hospitalizations '''were related to cellulitis<ref name="Raff" />
Patients presenting with mild cellulitis and no systemic signs of infection require antibiotics. The duration of oral antibiotic therapy should be for a minimum duration of 5 days.
*22-49% of patients who have cellulitis report at least one previous episode<ref name="Raff" />
*Recurrences, typically in the same location, occur approximately 14% of cellulitis cases within 1 year and in 45% of cases within 3 years<ref name="Raff" /><br>


<br>  
* Hospitalization for systemic antibiotics may be requires for patients with systemic signs of infection, have failed outpatient treatment, are immunocompromised, exhibit worsening erythema, are unable to tolerate oral medications, or have cellulitis overlying or near an indwelling medical device.<ref name=":2" />
* It is beyond a physiotherapists scope to know the individual antibiotics and best choices. The pharmacist ideally will have a board specialty in infectious disease to assist and work with the clinician on the best antibiotic selection.<ref name=":0" />
== Physical Therapy Management  ==


== Characteristics/Clinical Presentation  ==
While there is lack of evidence that discusses specific physical therapy interventions for cellulitis, therapists should be aware of the signs and symptoms in order to refer the patient appropriately. Physical therapists should have awareness of risk factors and various causes of cellulitis, in addition to signs and symptoms.<br>Modalities that physical therapists can use for a patient with cellulitis include
 
* Rest and elevation of the affected limb is important and can help alleviate pain.  
Typical symptoms include '''acute poorly demarcated''' and '''spreading erythema '''along with '''pain, swelling, and warmth of the lower extremity''' but can occur on any area of skin or underlying subcutaneous tissue.<ref name="Tsai">Tsai C-YL, Calvin MK, Chung C, Susan Shin-Jung L, Yao-Shen C, Hung C. Development of a prediction model for bacteremia in hospitalized adults with cellulitis to aid in the efficient use of blood cultures: a retrospective cohort study. BMC Infectious Diseases. 2016;16(1):581.</ref><ref name="Raff" />&nbsp;Additional symptoms may include fever, nausea, '''vomiting, and rigors'''<ref name="Raff" />.<ref name="Kilburn">Kilburn SA, Featherstone P, Higgins B, Brindle R. Interventions for cellulitis and erysipelas. (Cochrane review). Cochrane Database Syst Rev. 2010(6):CD004299.</ref>Other features include proximal dilated and edematous skin lymphatics and bulla formation. Cellulitis predominantly has a unilateral presentation, most commonly in the lower extremity.<ref name="Raff" /><br> <br>
* The application of cool, wet, sterile bandages is also recommended for pain relief, and ice can be used as well.  
 
'''Preventative Measures:''' Compression stockings; Exercise promotion and specific exercises eg calf pumps whilst standing in lines etc.<ref name="UMMC">University of Maryland Medical Center. http://umm.edu/health/medical/altmed/condition/cellulitis (accessed 25 March 2017).</ref>; Educate patient re the importance of maintaining good [[Hand Hygiene|hand hygiene]] and adequately clean any future abrasions in their skin.<ref name=":0" />
<br>
 
<br>
 
<br>
 
Classic presentation of cellulitis: poorly demarcated erythema<ref name="Bailey">Bailey E, Kroshinsky D. Cellulitis: Diagnosis and Management. Dermatologic Therapy. 2011;24:229–39.http://onlinelibrary.wiley.com/doi/10.1111/j.1529-8019.2011.01398.x/full  (accessed 15 Mar 2017).</ref>
 
== Associated Co-morbidities  ==
 
'''Diabetes Mellitus '''is one of most common comorbidities among those hospitalized for acute bacterial infections including cellulitis.<br>Following a cellulitis infection, those with diabetes require a longer course of antibiotic therapy and are more likely to have an outpatient follow up visit.<ref>Jenkins TC. Comparison of the Microbiology and Antibiotic Treatment among Diabetic and Non-Diabetic Patients Hospitalized for Cellulitis or Cutaneous Abscess. J Hosp Med. 9ADADDec12;:788–94.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4256165/ (accessed 28 Feb 2017).</ref><br>
 
Lymphatic flow changes can predispose individuals to a cutaneous infection. Examples of co-morbidities that result in lymphatic flow changes include '''peripheral vascular disease, liposuction, radiation therapy, lymph node dissection,'''and'''''<i>lymphedema</i> <br>
 
== Medications  ==
 
Cephalexin, Dicloxacillin, Penicillin VK, Amoxicillin, and Clindamycin are typical Antistreptococcal Antimicrobial agents for the treatment of typical cellulits that is considered mild and does not show signs of systemic involvement. <ref name="Raff" /><br>
 
<u>Table 1 </u>indicates which medications would be appropriate based on the severity of symptoms and the risk of Methicillin-resistant Staphylococcus aureus (MRSA).
 
{| width="200" border="1" align="center" cellpadding="1" cellspacing="1"
|+ ''Table 1''
|-
! scope="col" | Clinical Presentation
! scope="col" | Appropriate Antibiotic Treatment
|-
| Routine Cellulitis with low suspicion of MRSA
| Dicloxacillin, Cephalexin, Nafcillin, or Cefazolin<span class="Apple-tab-span" style="white-space:pre"> </span>
|-
| High suspicion of MRSA or Penicillin allergy
| Doxycyline, Clindamyciin, Trimethoprim-sulfamethoxazole
|-
| High suspicion of MRSA with signs and symptoms of severe infection or patient did not respond to intitial routine treatment<span class="Apple-tab-span" style="white-space:pre"> </span>
| Vancomycin♦, Linezolid
|}
 
♦Vancomycin is the preferred treatment for MRSA<ref name="Raff" />
 
== Diagnostic Tests/Lab Tests/Lab Values  ==
 
Cultures are typically not beneficial in making a cellulitis diagnosis. It is most commonly diagnosed by&nbsp;'''history and physical examination alone.''' Certain laboratory tests can indicate the presence of infection, but are not specific to cellulitis alone. Elevated white blood cell count, C-reactive protein, and erythrocyte sedimentation rate are the most common laboratory results in people with cellulitis, though the prevalence of these results varies widely on a case by case basis <br> Imaging studies can identify more severe infections to differentiate from cellulitis, but are not a reliable diagnostic tool for cellulitis itself.<ref name="Raff" /><br>
 
Identification of the cause of the infection through blood, needle aspiration or punch biopsy are not recommended unless the patient has a complication or abnormal exposure history. This would include immunosuppressants, a diagnoses of chronic liver disease, aquatic soft tissue injury, animal and human bites, or being in contact with various bacterias.<ref name="Raff" />
 
If a biopsy and culture is warranted, a histopathologic evaluation will be performed on the sample. Hematoxylin-and-eosin and certain stainings for organisms, bacteria, fungi, and microbacteria will be included.<ref name="McNamara">McNamara DR, Tleyjeh IM, Berbari EF, Lahr BD, Martinez J, Mirzoyev SA, Baddour LM. A predictive model of recurrent lower extremity cellulitis in a population-based cohort. Arch Intern Med. 2007;167(7):709-715 http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/412163 (accessed 15 March 2017)</ref>
 
== Etiology/Causes  ==
 
Cellulitis can be caused by various organisms but most commonly by&nbsp;'''Streptococcus pyogenes''' or '''Staphylococcus aureus'''.<ref>Phoenix G, Das S, Joshi M. Diagnosis and management of cellulitis. Bmj [Internet]. 2012Jul [cited 2017Mar20];345(aug07 2):38–42. Available from: http://www.bmj.com/bmj/section-pdf/187604?path=/bmj/345/7869/Clinical_Review.full.pdffckLRMedscape. Cellulitis. http://emedicine.medscape.com/article/214222-overview (accessed 27 Feb 2017).</ref> The organisms may enter the body after a cut, bite, or wound that compromises the skin or may enter through microscopic changes in the skin. They enter the dermis and multiply to cause cellulitis. <br>
 
Studies show '''lymphedema is a major risk factor '''for the development of cellulitis. There is known to be a link between the two, but it is not known which of the two comes first. Patients with lymphedema or chronic edema are more prone to infection due to damage to lymphatic vessels and immune deficiency in that area. Cellulitis on the other hand, can cause damage to the lymphatics and the development of lymphedema.<ref name="Riches">Riches K, Keeley V. Cellulitis in patients with chronic oedema. Nursing &amp;amp; Residential Care [serial on the Internet]. (2012, Mar), [cited March 31, 2017]; 14(3): 122-127. Available from: CINAHL with Full Text.</ref>
 
[[Image:Cellulitis and lymphedema.JPG|center]]<ref name="Riches" /><br>
 
== Systemic Involvement  ==
 
Cellulitis can be found anywhere on the skin, and can cause systemic issues in those areas. Locally, cellulitis often results in significant tissue damage in the involved area.<ref name="Raff" /> Cellulitis can spread systemically through the lymphatics and blood stream, which can lead to further complications.<ref name="Medscape" />If cellulitis does spread systemically through one of these systems, it can cause flu-like symptoms such as fever, rigors, nausea and vomiting.<ref name="Kilburn" /><ref name="Riches">Riches K, Keeley V. Cellulitis in patients with chronic oedema. Nursing &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Residential Care [serial on the Internet]. (2012, Mar), [cited March 31, 2017]; 14(3): 122-127. Available from: CINAHL with Full Text.</ref>Though rare, there is a risk for '''severe sepsis, gangrene, or necrotizing fasciitis''' if cellulitis spreads systemically and is left untreated.<ref name="Kilburn" /><br>
 
[[Image:Cellulitis Mayo.PNG|center|350x250px]]<ref>Cellulitis [Internet]. Mayo Clinic. [cited 2017Apr4]. Available from: http://www.mayoclinic.org/diseases-conditions/cellulitis/basics/definition/con-20023471</ref><br>
 
== Medical Management (current best evidence)  ==
 
Currently, there are no published national guidelines for the treatment of cellulitis.
 
Although there are no national guidelines, there are two classification systems based on expert opinion that may be used. The&amp;nbsp;'''Eron Classification''' system is the most widely used and is described in Table 3. A more recent classification system, The '''Dundee Classification''', was released in 2010. Table 4 compares these two classification systems based on strength of evidence, validation, and criteria.<ref name="Phoenix">Phoenix G, Das S, Joshi M. Diagnosis and management of cellulitis. Bmj [Internet]. 2012Jul [cited 2017Mar20];345(aug07 2):38–42. Available from: http://www.bmj.com/bmj/section-pdf/187604?path=/bmj/345/7869/Clinical_Review.full.pdffckLRMedscape. Cellulitis. http://emedicine.medscape.com/article/214222-overview (accessed 27 Feb 2017).</ref>
 
Most common management of the infection is administration of '''antibiotics'''. In more severe cases of cellulitis, intravenous antibiotics can be used.<ref name="McNamara" />Elevation and compression of the affected area promotes drainage of edema and can reduce inflammation, speeding up recovery.<ref name="McNamara" />
 
For those with recurrent cellulitis, prophylactic antibiotic therapy is an option. Recent studies show that antibiotic prophylaxis substantially reduced the number or recurrences experienced by patients while actively taking the medication. Although there is reduction during the antibiotic therapy, there is no evidence of persistent protect effect after it has ceased.<ref name="Mason" />
 
Below is a treatment algorithm for Non-purulent Cellulitis, as described by Raff et. al.<ref name="Raff" />
 
[[Image:Medicalmanagementcellulitis.jpg|center|650x600px]]
 
While there is lack of evidence that discusses specific physical therapy interventions for cellulitis, therapists should be aware of the signs and symptoms in order to refer the patient appropriately. Physical therapists should have awareness of risk factors and various causes of cellulitis, in addition to signs and symptoms.  
 
There are some modalities that physical therapists can use for a patient with cellulitis. Rest and elevation of the affected limb is important and can help alleviate pain. The application of cool, wet, sterile bandages is also recommended for pain relief, and ice can be used as well. Massage to promote lymphatic drainage, may help prevent cellulitis, particularly when used in conjunction with compression and exercise. However it should not be used during an active cellulitis infection.<ref name="UMMC">University of Maryland Medical Center. http://umm.edu/health/medical/altmed/condition/cellulitis (accessed 25 March 2017).</ref>  
 
== Physical Therapy Management (current best evidence)  ==
 
While there is lack of evidence that discusses specific physical therapy interventions for cellulitis, therapists should be aware of the signs and symptoms in order to refer the patient appropriately. Physical therapists should have awareness of risk factors and various causes of cellulitis, in addition to signs and symptoms.
 
There are some modalities that physical therapists can use for a patient with cellulitis. Rest and elevation of the affected limb is important and can help alleviate pain. The application of cool, wet, sterile bandages is also recommended for pain relief, and ice can be used as well. Massage to promote lymphatic drainage, may help prevent cellulitis, particularly when used in conjunction with compression and exercise. However it should not be used during an active cellulitis infection.<ref name="Maryland" />  


== Differential Diagnosis  ==
== Differential Diagnosis  ==
Many and include:


Common differential diagnoses for Cellulitis include '''Deep Vein Thrombosis, Dermatitis, and Erythema Migrans'''. A description of these and additional diagnoses are described in Table 1<ref name="Bailey" />
* Necrotising soft tissue infections
 
* [[Deep Vein Thrombosis|Deep vein thrombosis]]
A diagnosis other than Cellulitis can be due to infectious, inflammatory, vascular or neoplastic conditions. These are discussed in Table 2.<ref name="Raff" />
* Myriad of non-infective erythematous rashes
 
* Dermatitis
[[Image:DD Cellulitis.PNG|334x710px]]
* Thermal injury<ref name=":1" />
 
== Case Reports/ Case Studies  ==
 
add links to case studies here (case studies should be added on new pages using the [[Template:Case Study|case study template]])<br><br>
 
== Resources <br>  ==
 
<u>Patient Resources:</u>
 
American Academy of Dermatology tips for avoiding recurrance of Cellulitis:
 
#Avoid injuring your skin
#Treat wounds right away
#Keep your skin clean and moisturized
#Keep your nails well-manicured
#Do not have blood drawn in an arm that has had cellulitis
#Treat infections promptly
#Treat other medical conditions
#Treat lymphedema
#Lose weight
#Stop Smoking
#If you drink alcohol, drink in moderation
#Check your feet every day to see if you have an injury or infection
 
[[Image:Cellulitis prevention.JPG|center|300x200px]]
 
<u>Healthcare Provider Resources:</u>  
 
The following video link by dermatologist Dr. Noah Craft MD, PhD, DTMH discusses Cellulitis from the provider point of view and includes case studies, differential diagnosis, and treatment approaches.


https://www.youtube.com/watch?v=ZkntcZt0aho&amp;feature=youtu.be<br>  
== Complications ==
Without prompt diagnosis and treatment, cellulitis could lead to several complications. Cellulitis that leads to bacteremia, [[endocarditis]], or [[osteomyelitis]] will require a longer duration of [[antibiotics]] and possibly [[Surgery and General Anaesthetic|surgery]].<ref name=":0" /> Cellulitis can spread systemically through the lymphatics and blood stream, which can lead to further complications.<ref name="Medscape">Medscape. Cellulitis. http://emedicine.medscape.com/article/214222-overview (accessed 27 Feb 2017).</ref> If cellulitis does spread systemically through one of these systems, it can cause flu-like symptoms such as fever, rigors, nausea, and vomiting.<ref name="Kilburn">Kilburn SA, Featherstone P, Higgins B, Brindle R. Interventions for cellulitis and erysipelas. (Cochrane review). Cochrane Database Syst Rev. 2010(6):CD004299.</ref><ref name="Riches" /> Though rare, there is a risk for severe sepsis, gangrene, or [[Necrotizing Fasciitis (Flesh Eating Disease)|necrotizing fasciitis]] if cellulitis spreads systemically and is left untreated.<ref name="Kilburn" />


== Recent Related Research (from Pubmed)  ==
== Prognosis ==
<div class="researchbox"><rss>https://eutils.ncbi.nlm.nih.gov/entrez/eutils/erss.cgi?rss_guid=1rcqEVKTXPdU_THu5OwtF4_n0GbEZDnxznFzHEp2hKGQBBh1Le|charset=UTF-8|short|max=10</rss></div>
Overall, cellulitis has a good prognosis
== References  ==
* If promptly diagnosed cellulitis with correct antibiotic treatment, patients can expect to notice an improvement in signs and symptoms within 48 hours.
* Annual recurrence of cellulitis occurs in about 8 to 20% of patients, with overall reoccurrence rates reaching as high as 49%
* Recurrence is preventable with prompt treatment of cuts or abrasions, proper hand hygiene, as well as effectively treating any underlying comorbidities.
* There is approximately an 18% failure rate with initial antibiotic treatment. <ref name=":0" />


see [[Adding References|adding references tutorial]].  
== Resources  ==
A [https://www.youtube.com/watch?v=ZkntcZt0aho&feature=youtu.be video link] by dermatologist Dr. Noah Craft MD, PhD, DTMH discusses Cellulitis from the provider point of view and includes case studies, differential diagnosis, and treatment approaches.  
== References  ==


<references />  
<references />  


[[Category:Bellarmine_Student_Project]]
[[Category:Conditions]]
[[Category:Bellarmine_Student_Project]]
[[Category:Primary Contact]]
[[Category:Acute Care]]

Latest revision as of 07:48, 29 January 2023

Introduction[edit | edit source]

Severe case of cellulitis

Cellulitis is a common infection of the dermis and subcutaneous tissues. Cellulitis typically presents with pain, erythema, oedema, and warmth. Cellulitis is not transmitted by person-to-person contact as the epidermis is not involved.[1] If correctly identified and treated promptly with appropriate antibiotic treatment is usually resolves.[2]

Etiology[edit | edit source]

Cellulitis and lymphedema

The skin is a protective barrier that stops normal skin flora and other microbial pathogens reaching the subcutaneous tissue and lymphatic system. If a skin breakage occurs normal skin flora and other bacteria can enter the dermis and subcutaneous tissue, leading potentially to an acute infection affecting the deep dermis and subcutaneous tissue. Cellulitis most commonly results from infection with group A beta-hemolytic streptococcus (i.e., Streptococcus pyogenes).[2]

Risk factors for cellulitis include: skin injuries; surgical incisions; intravenous site punctures; fissures between toes; insect and animal bites; other skin infections; patients with comorbidities such as diabetes mellitus, venous insufficiency, peripheral arterial disease, and lymphedema.[2]

Epidemiology[edit | edit source]

Cellulitis is relatively common, occurring often in middle-aged and older adults. Men and women, have a similar incidence of cellulitis. There are approximately 50 cases per 1000 patient-years[2]

Pathophysiology[edit | edit source]

Cellulitis takes place after the skin is disrupted and microorganisms invade the subcutaneous tissues. Most commonly the infective agent is beta-haemolytic streptococci (most often) or staphylococcus aureus (including methycillin-resistant). [1]

Clinical Presentation[edit | edit source]

A classic presentation of cellulitis: poorly demarcated erythema[3] 

Typical symptoms of cellulitis include acute poorly demarcated and spreading erythema along with pain, swelling, and warmth. Commonly affects a lower limb but can occur on any area of skin or underlying subcutaneous tissue.[4][5] Regional lymphadenopathy and lymphangitis may be present alongside systemic features such as fevers and rigors.[1]

Examination[edit | edit source]

Patients with cellulitis will reveal an affected skin area typically with a poorly demarcated area of erythema. The erythematous area is often warm to the touch with associated swelling and tenderness to palpation. The patient may present with constitutional symptoms of generalized malaise, fatigue, and fevers.

  • Ask for a complete history of the presenting illness, focusing on the context in which the patient noticed the skin changes or how the cellulitis began to occur.
  • It is essential to ask patients if they: recently traveled, experienced any trauma or injuries, have a history of intravenous drug use, and/or have had insect or animal bites to the affected area.
  • A complete and thorough past medical history should additionally be conducted to evaluate for possible chronic medical conditions that predispose patients to cellulitis, such as diabetes mellitus, venous stasis, peripheral vascular disease, chronic tinea pedis, and lymphedema. Diabetes Mellitus is one of most common comorbidities among those hospitalized for acute bacterial infections including cellulitis. Following a cellulitis infection, those with diabetes require a longer course of antibiotic therapy and are more likely to have an outpatient follow-up visit.[6].[7]
  • Inspected area to look for any area of skin breakdown. The area should be demarcated with a marker to monitor for continuous spread. The area should be palpated to feel for fluctuance that could indicate the formation of a possible abscess.
  • Gently palpate the affected area, be sure to note any presence of warmth, tenderness, or purulent drainage.
  • Cellulitis can present on any area of the body, but most often affects the lower extremities. It is rarely bilateral. 
  • In lower extremity cellulitis, careful examination between interspaces of the toes should take place.
  • Check for proper sensation and verify pulses are intact to monitor closely for compartment syndrome.
  • Note if there are developing vesicles, bullae, or the presence of peau d'orange and lymphadenopathy.[8]

Diagnosis[edit | edit source]

Cultures is most commonly diagnosed by history and physical examination alone. Two of the four criteria (warmth, erythema, edema, or tenderness) are needed for diagnosis.[2]

Medical Management[edit | edit source]

Patients presenting with mild cellulitis and no systemic signs of infection require antibiotics. The duration of oral antibiotic therapy should be for a minimum duration of 5 days.

  • Hospitalization for systemic antibiotics may be requires for patients with systemic signs of infection, have failed outpatient treatment, are immunocompromised, exhibit worsening erythema, are unable to tolerate oral medications, or have cellulitis overlying or near an indwelling medical device.[2]
  • It is beyond a physiotherapists scope to know the individual antibiotics and best choices. The pharmacist ideally will have a board specialty in infectious disease to assist and work with the clinician on the best antibiotic selection.[8]

Physical Therapy Management[edit | edit source]

While there is lack of evidence that discusses specific physical therapy interventions for cellulitis, therapists should be aware of the signs and symptoms in order to refer the patient appropriately. Physical therapists should have awareness of risk factors and various causes of cellulitis, in addition to signs and symptoms.
Modalities that physical therapists can use for a patient with cellulitis include

  • Rest and elevation of the affected limb is important and can help alleviate pain.
  • The application of cool, wet, sterile bandages is also recommended for pain relief, and ice can be used as well.

Preventative Measures: Compression stockings; Exercise promotion and specific exercises eg calf pumps whilst standing in lines etc.[9]; Educate patient re the importance of maintaining good hand hygiene and adequately clean any future abrasions in their skin.[8]

Differential Diagnosis[edit | edit source]

Many and include:

  • Necrotising soft tissue infections
  • Deep vein thrombosis
  • Myriad of non-infective erythematous rashes
  • Dermatitis
  • Thermal injury[1]

Complications[edit | edit source]

Without prompt diagnosis and treatment, cellulitis could lead to several complications. Cellulitis that leads to bacteremia, endocarditis, or osteomyelitis will require a longer duration of antibiotics and possibly surgery.[8] Cellulitis can spread systemically through the lymphatics and blood stream, which can lead to further complications.[10] If cellulitis does spread systemically through one of these systems, it can cause flu-like symptoms such as fever, rigors, nausea, and vomiting.[11][7] Though rare, there is a risk for severe sepsis, gangrene, or necrotizing fasciitis if cellulitis spreads systemically and is left untreated.[11]

Prognosis[edit | edit source]

Overall, cellulitis has a good prognosis

  • If promptly diagnosed cellulitis with correct antibiotic treatment, patients can expect to notice an improvement in signs and symptoms within 48 hours.
  • Annual recurrence of cellulitis occurs in about 8 to 20% of patients, with overall reoccurrence rates reaching as high as 49%
  • Recurrence is preventable with prompt treatment of cuts or abrasions, proper hand hygiene, as well as effectively treating any underlying comorbidities.
  • There is approximately an 18% failure rate with initial antibiotic treatment. [8]

Resources[edit | edit source]

A video link by dermatologist Dr. Noah Craft MD, PhD, DTMH discusses Cellulitis from the provider point of view and includes case studies, differential diagnosis, and treatment approaches.

References[edit | edit source]

  1. 1.0 1.1 1.2 1.3 Radiopedia Cellulitis Available:https://radiopaedia.org/articles/cellulitis (accessed 29.1.2023)
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Brown BD, Watson KL. Cellulitis. InStatPearls [Internet] 2022 Aug 8. StatPearls Publishing.Available:https://www.ncbi.nlm.nih.gov/books/NBK549770/ (accessed 29.1.2023)
  3. Bailey E, Kroshinsky D. Cellulitis: Diagnosis and Management. Dermatologic Therapy. 2011;24:229–39.http://onlinelibrary.wiley.com/doi/10.1111/j.1529-8019.2011.01398.x/full (accessed 15 Mar 2017).
  4. Tsai C-YL, Calvin MK, Chung C, Susan Shin-Jung L, Yao-Shen C, Hung C. Development of a prediction model for bacteremia in hospitalized adults with cellulitis to aid in the efficient use of blood cultures: a retrospective cohort study. BMC Infectious Diseases. 2016;16(1):581.
  5. Raff AB, Kroshinsky D. Cellulitis: A Review. JAMA. 2016;316(3):325-37. http://jamanetwork.com/pdfaccess.ashx?url=/data/journals/jama/935437/ (accessed 27 Feb 2017).
  6. Jenkins TC. Comparison of the Microbiology and Antibiotic Treatment among Diabetic and Non-Diabetic Patients Hospitalized for Cellulitis or Cutaneous Abscess. J Hosp Med. 9ADADDec12;:788–94.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4256165/ (accessed 28 Feb 2017).
  7. 7.0 7.1 Riches K, Keeley V. Cellulitis in patients with chronic oedema. Nursing & Residential Care [serial on the Internet]. (2012, Mar), [cited March 31, 2017]; 14(3): 122-127. Available from: CINAHL with Full Text.
  8. 8.0 8.1 8.2 8.3 8.4 Brown BD, Watson KL. Cellulitis. InStatPearls [Internet] 2019 Nov 6. StatPearls Publishing. Available from:https://www.ncbi.nlm.nih.gov/books/NBK549770/ (last accessed 12.2.2020)
  9. University of Maryland Medical Center. http://umm.edu/health/medical/altmed/condition/cellulitis (accessed 25 March 2017).
  10. Medscape. Cellulitis. http://emedicine.medscape.com/article/214222-overview (accessed 27 Feb 2017).
  11. 11.0 11.1 Kilburn SA, Featherstone P, Higgins B, Brindle R. Interventions for cellulitis and erysipelas. (Cochrane review). Cochrane Database Syst Rev. 2010(6):CD004299.