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'''For patient information click [[Rat-bite fever (patient information)|here]]'''
'''This page is about clinical aspects of the disease.  For microbiologic aspects of specific causative organisms:'''
{{Seealso|Streptobacillus moniliformis}}
{{Seealso|Spirillum minus}}
{{Rat-bite fever}}
{{Rat-bite fever}}


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==[[Rat-bite fever causes|Causes]]==
==[[Rat-bite fever causes|Causes]]==
Normal commensal of rodent oropharynx also in ferrets, weasels, gerbils.
Risk factors for acquisition: crowded urban dwellings (especially kids), lab workers.
Transmission: bite/scratch from rat, mice, squirrels—also cats, dogs, pigs.


==[[Rat-bite fever differential diagnosis|Differentiating Rat-bite fever from other Diseases]]==
==[[Rat-bite fever differential diagnosis|Differentiating Rat-bite fever from other Diseases]]==
Differential diagnosis is rash on palms/soles consider RMSF, syphilis. Arthritis- disseminated gonorrhea, Lyme, brucella, endocarditis, rheumatological disease, and rheumatic fever.


==[[Rat-bite fever natural history, complications and prognosis|Natural History, Complications and Prognosis]]==
==[[Rat-bite fever natural history, complications and prognosis|Natural History, Complications and Prognosis]]==
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==Diagnosis==
==Diagnosis==
[[Rat-bite fever history and symptoms|History and Symptoms]] | [[Rat-bite fever physical examination|Physical Examination]] | [[Rat-bite fever laboratory findings|Laboratory Findings]] | [[Rat-bite fever imaging findings|Imaging Findings]] | [[Rat-bite fever other diagnostic studies|Other Diagnostic Studies]]
[[Rat-bite fever history and symptoms|History and Symptoms]] | [[Rat-bite fever physical examination|Physical Examination]] | [[Rat-bite fever laboratory findings|Laboratory Findings]] | [[Rat-bite fever imaging findings|Imaging Findings]] | [[Rat-bite fever other diagnostic studies|Other Diagnostic Studies]]
'''Symptoms'''- incubation for 10-day fever, chills, HA, N/V, migratory arthralgias, leukocytosis. Days 2-4 days: nonpruritic maculopapular, petechial, or pustular rash (palms soles, extremities). May be purpuric/confluent. In 50% pts, polyarthritis (even septic arthritis) with or after onset rash (knees>ankles>elbows>hips). Most symptoms resolve within 2 weeks (even if no abx). Arthritis can persist  for 2 years. Nonzoonotic transmission (orally): aka Haverhill Fever (similar manifestations as RBF). Rodent excrement contaminating water, milk, turkey meat. Milk contamination associated w/ epidemics.
'''Diagnosis'''- Gram or Giemsa stain blood, joint fluid, pus. Perform culture using TSA or blood agar. ELISA or agglutinins (sero-negative within 5 months-2 yrs); PCR.


==Treatment==
==Treatment==
[[Rat-bite fever medical therapy|Medical Therapy]] | [[Rat-bite fever primary prevention|Prevention]]  | [[Rat-bite fever cost-effectiveness of therapy|Cost-effectiveness of Therapy]] | [[Rat-bite fever future or investigational therapies|Future or Investigational Therapies]]
[[Rat-bite fever medical therapy|Medical Therapy]] | [[Rat-bite fever primary prevention|Prevention]]  | [[Rat-bite fever cost-effectiveness of therapy|Cost-effectiveness of Therapy]] | [[Rat-bite fever future or investigational therapies|Future or Investigational Therapies]]


==Antimicrobial therapy==
==Related Chapters==
 
* [[Streptobacillus moniliformis]]
:* Streptococcus moniliformis treatment<ref>{{cite book | last = Bartlett | first = John | title = Johns Hopkins ABX guide : diagnosis and treatment of infectious diseases | publisher = Jones and Bartlett Learning | location = Burlington, MA | year = 2012 | isbn = 978-1449625580 }}</ref>
* [[Spirillum minus]]
 
::* (1) '''Migratory arthropathy and arthritis'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (2) '''Diarrhea, (especially kids) liver or spleen abscess'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (3) '''Undifferentiated fever'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (4) '''Endocarditis, myocarditis, pericarditis (cardiac)'''
:::* Preferred regimen: [[Penicillin]] 20 MU/day IV divided q4h. Optimal duration recommendation for infective endocarditis is 4 weeks.
:::* Alternative regimen: [[Cephalosporins]]-[[Ceftriaxone]] {{or}} [[Clindamycin]] {{or}} [[Erythromycin]] {{or}} [[Chloramphenicol]] {{and}} [[Streptomycin]].
 
::* (5) '''Meningitis, brain abscess'''
:::* Preferred regimen: [[Penicillin]] 20 MU/day IV divided q4h.
:::* Alternative regimen: [[Cephalosporins]]-[[Ceftriaxone]] {{or}} [[Clindamycin]] {{or}} [[Erythromycin]] {{or}} [[Chloramphenicol]] {{and}} [[Streptomycin]].
 
::* (6) '''Anemia'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (7)''' Pneumonia'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (8) '''Amnionitis''' (pregnancy)
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
::* (9) '''Renal abscess'''
:::* Preferred regimen (uncomplicated disease): [[Penicillin G]] 2.4-4.8 MU/day IV divided q6h. If better after 1 wk, switch to oral [[Amoxicillin]] {{or}} Penicillin Vk complete 14 days.
 
* '''Prevention'''
 
::* Eradication of rats.
::* Pasteurize milk.
::* Avoid contaminated water.
::* Use gloves when handling rodents in lab (can also be carried by hamsters and other laboratory rodents).
::* If bitten: oral [[Penicillin]] (2 gs) for 3 days may be beneficial.
 
==References==
 
{{reflist|2}}
 
==External Links==
*[http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5351a2.htm Case report of fatal incidence in the USA]
*http://www.cdc.gov/rat-bite-fever/
 
{{Bacterial diseases}}
[[hr:Vrućica štakorskog ugriza]]
[[it:febbri da morso di ratto]]
[[ja:鼠咬症]]


[[Category:Disease]]
[[Category:Disease]]
[[Category:Bacterial diseases]]
[[Category:Bacterial diseases]]
[[Category:Infectious diseases]]
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Latest revision as of 19:21, 6 August 2015

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: Spirillum minus rat bite fever; spirochaeta morsus minus; spirochaeta muris; sokosho; sodoku.

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