Original Editors - Dana Collins from Bellarmine University's Pathophysiology of Complex Patient Problems project.
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Definition/Description[edit | edit source]
Tularemia, named after the infectious gram-negative bacterium Francisella tularensis, is a zoonotic disease. A zoonotic disease is one that is spread from animal to human (infected humans can NOT pass the disease to other humans). This spread may be directly i.e. handling contaminated meat or through a carrier i.e. a tick. It is also known as “Ohara’s disease”, “rabbit fever”, “deer-fly fever”, “market’s men disease”, “meat-cutter’s disease”, “glandular type of tick fever”, “water rat-trappers’ disease”. It is highly infectious, <10 organisms causing severe disease in both humans and animals. There are 4 sub-types of the bacterium, the most common in the United States are Type A, tularenis, and Type B, holarctica. It is on the Center for Disease Control’s list of bioterroism threats.
Prevalence[edit | edit source]
The prevalence of Tularemia in the United States depends on the geographical location and the time of year. During the spring and summer months (May-September), there is a rise in reported cases. South-Central, Pacific Northwest, and parts of the East Coast have the highest incidence of Tularemia. While the population most effected is young males 5-9 years old and those > 75 years old.
The above images from: http://www.cdc.gov/tularemia/statistics/.
Note: The 2 most common forms are glandular/ulcerglandular and pneumonic.
Those occurring in ≥25% of those infected with the glandular and ulceroglandular form are in bold
Those occurring in ≥25% of those infected with the pneumonic form are in italics
Expectations/Prognosis[edit | edit source]
Untreated: Fatality ~5%
Treated: Fatality <1%
Poor outcomes have been associated with those who have underlying co-morbidities such as alcoholism or diabetes and those who delay seeking medical treatment.
Medications[edit | edit source]
Antibiotic therapy is used to treat Tularemia. Streptomyocin and Gentamicin are usually the first administered. Ciprofloxacin along with other fluoroquinolones. Tetracycline and chloramphenicol may also be used to treat Tularemia, however they have higher relapse rates than the previously mentioned.
Resistant to beta-lactam antibiotics and azithromycin.
Diagnostic Tests/Lab Tests/Lab Values[edit | edit source]
There are numerous ways to test for F. tularensis:
• Gold Standard: Bacteriologic Culture
• Most Common: Serology
• Polymerase Chain Reaction of sample ulcer
• Direct Stains
• Blood Culture
• Direct Fluorescent Antibody Stain
• Slide Agglutination
• Antimicrobial Susceptibility
• Biochemical Identification
• Enviornmental Specimen Evaluation
• Chest X-ray
Etiology/Causes [edit | edit source]
Direct transmission occurs from direct contact with the infected animal or direct contact from soil, water, or landscape. This may be from ingestion of contaminated meat (most likely rabbit), water, or inhaled dust. It can also be passed from handling or skinning contaminated animals or from a bite/scrath from a contaminated animal. Animal hosts that may spread Tularemia include lagomorphs (rabbit and hare), rodents, insectivores, carnivores, ungulates, marsupials, birds, amphibians, fish, and invertebrates. Secondary carriers include ticks, mosquitoes, biting flies or deerfly. With such a wide variety of hosts and carriers available of this disease, it is has the possibility to appear/outbreak in other regions.
Systemic Involvement ,[edit | edit source]
- Supporation of local lymph nodes
- 2o Pneumonia
- Hematogenous Spread to other organs resulting in:
- Renal Failure
- Rhabomyolisis (typhoidal form)
- ARDS (penumonic form)
- Lung Abscess (pneumonic form)
- Fibrosis/Calcification of affected lung areas (pneumonic form)
- Pleuritis (pneumonic form)
With all forms of Tularmemia illness MAY result in such debilitating conditions (more so when other systems are involved), that recovery can take several months.
Medical Management (current best evidence) [edit | edit source]
Antimicrobials are currently the best treatment option for Tularemia infections. After beginning treatment one should expect to see an improvement in symptoms and fever within 24-48 hours.
- Streptomyocin 10-14 days (1st choice)
- May also be treated with gentamicin or tetracycline for 14+ days
Tetracycline should not be used as a treatment in those whose permanent teeth have not came in.
- Contraindicated in those < 18 years of age
- "well tolerated, achieve adequate blood levels...and have excellent intracellular penetration"
A review of 10 documented treatment cases in the United States found that those treated with Aminoglycosides have a 6-12% relapse rate of infection, while those treated with Quinolones had a 0% relapse rate.
Physical Therapy Management (current best evidence)[edit | edit source]
Currently did not come across any management in regards to physical therapy.
Points to consider:
- Pt's with tularemia present with generalized musculoskeletal aches.
- Pt's who have complications develop 2o to their primary Tularemia infection may take months to recover. During this time physical therapy may play a roll in conditioning,balance retraining, rebuilding strength and endurance, and regaining patient's independence in their functional roles in society and home.
Differential Diagnosis[edit | edit source]
Differential Characteristics to rule out Tularemia
Glandular[edit | edit source]
- Bubonic Plague
- Cat-Scratch Disease
History of cat scratch
Takes weeks to develop
- Myobacterial Infection
Lymph Nodes painless/non-tender
No systemic symptom
Lymph nodes painless
History of contact w/ soil/plants
Lesions along lymphatic chains
- Lymphogranuloma Venereum
Adenitis in genital lymph chains only
- Primary Genital Herpes
Adenitis in genital lymph chains only
- Secondary Syphilis
Enlarged lymph nodes in inguinal region only
Ulceroglandular[edit | edit source]
Painless ulcer --> black eschar; non-pitting edema around lesion
Pustule that progresses to weeping nodule
- Pasteurella infections
History of dog/cat bite or licking of open wound
- Primary Syphillis
Painless ulcer at genital site
Painless papule --> black eschar; maculopapular rash in 2-3 days
- Scrub Typhus
Maculopapular rash; Infection from chigger bites
- Staphylococcal/Stretococcal Cellulitis
History of trauma or pre-existing lesion
Pneumonic [edit | edit source]
- Community Acquired Pneumonia
Won't cure with conventional antibiotic therapy
- Inhalation of Anthrax
- Pneumonic Plague
Consolidation on Chest X-ray
- Q Fever
Exposure to sheep, goat, cattle, cat
Difficult to differentiate from Tularemia
More common in elderly and those living in close living quarters
- Viral Pneumonia
Recent cruise or trip to tropics
Exposure to feces/urine of mice
- Respiratory Syncytial Virus
More common in children during Winter and Spring
Oculoglandular [edit | edit source]
- Adenoviral Infection
- Cat-Scratch Disease
- Herpes Infection
- Pyogenic Bacterial Infections
Oropharyngeal [edit | edit source]
- Streptococcal Pharyngitis
- Infections Mononucleosis
- Adenoviral Infection
Typhoidal [edit | edit source]
- Disseminated Mycobacterial/Fungal Infection
- Pontiac Fever
- Q Fever
- Typhoid Fever
Case Reports/ Case Studies[edit | edit source]
Isolation of Francisella tularensis from blood.
Tularemia: Emergency department presentation of an infrequently recognized disease.
Treatment of tularemia with fluoroquinolones: two cases and review.
Resources[edit | edit source]
References[edit | edit source]
- Wilson M, Lountzis N, Ferringer T. Zoonoses of dermatologic interest. Dermatologic Therapy. 2009;22:367-378. http://onlinelibrary.wiley.com/doi/10.1111/j.1529-8019.2009.01248.x/abstract. Accessed February 2011.
- Petersen JM, Schriefer ME. Tularemia: emergence/re-emergence. Vet Res. 2005;36:455-467. http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1031&context=zoonoticspub&sei-redir=1#search=%22Petersen+JM,+Schriefer+ME.+Tularemia:+emergence/re-emergence.%22. Accessed February 2011.
- Hayes E, Marshall S, Dennis D. Tualremia--United States,1990-2000. www.cdc.gov/mmwr/preview/mmwrhtml/mm5109a1.htm. February 20, 2011.
- CIDRAP. Tularemia: Current, comprehensive information on pathogenesis, microbiology, epidemiology, diagnosis, treatment, and prophylaxis. http://www.cidrap.umn.edu/cidrap/content/bt/tularemia/biofacts/tularemiafactsheet.html. Updated March 16, 2010. Accessed February 2011.
- Tularemia. PubMed Health. http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001859/. Updated March 17,2009. Accessed February 19, 2011.
- Limaye AP, Hooper CJ. Treatment of tularemia with flouroquinolones: two cases and review. Clinical Infectious Diseases. 1999;29:922-924. http://www.ncbi.nlm.nih.gov/pubmed/10589911. Accessed February 2011.
- Provenza JM, Klotz SA, Penn RL. Isolation of francisella tularenis from blood. Journal of Clinical Microbiology. 1986;24:453-455. http://jcm.asm.org/cgi/content/short/24/3/453. Accessed February 2011.
- Harrell RE, Whitaker GR. Tularemia: Emergency department presentation of an infrequently recognized disease. Am J Emerg Med. 1985;3:415-418. http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W9K-4C4FJTF-GS&_user=10&_coverDate=09%2F30%2F1985&_rdoc=1&_fmt=high&_orig=gateway&_origin=gateway&_sort=d&_docanchor=&view=c&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=8437c09158b0597f13c1896c220c972e&searchtype=a. Accessed February 2011.
- Limaye AP, Hooper CJ. Treatement of tularemia with fluoroquinolones: Two cases and review. Clinical Infectious Diseases. 1999;29:922-924.http://www.ncbi.nlm.nih.gov/pubmed/10589911. Accessed February 2011.