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Microbiology ` microbiology—cliNical bacteriology Microbiology ` microbiology—cliNical bacteriology SEcTioN ii 149
Chlamydia trachomatis serotypes
Types A, B, and C Chronic infection, cause blindness due to ABC = Africa, Blindness, Chronic infection.
follicular conjunctivitis in Africa.
Types D–K Urethritis/PID, ectopic pregnancy, neonatal D–K = everything else.
pneumonia (staccato cough) with eosinophilia, Neonatal disease can be acquired during
neonatal conjunctivitis (1–2 weeks after birth). passage through infected birth canal.
Types L1, L2, and L3 Lymphogranuloma venereum—small, painless
ulcers on genitals swollen, painful inguinal
lymph nodes that ulcerate (buboes). Treat with
doxycycline.
Zoonotic bacteria Zoonosis—infectious disease transmitted between animals and humans.
sPecies Disease traNsmissioN aND soUrce
Anaplasma spp Anaplasmosis Ixodes ticks (live on deer and mice)
Bartonella spp Cat scratch disease, bacillary angiomatosis Cat scratch
Borrelia burgdorferi Lyme disease Ixodes ticks (live on deer and mice)
Borrelia recurrentis Relapsing fever Louse (recurrent due to variable surface
antigens)
Brucella spp Brucellosis/undulant fever Unpasteurized dairy
Campylobacter Bloody diarrhea Feces from infected pets/animals; contaminated
meats/foods/hands
Chlamydophila psittaci Psittacosis Parrots, other birds
Coxiella burnetii Q fever Aerosols of cattle/sheep amniotic fluid
Ehrlichia chaffeensis Ehrlichiosis Amblyomma (Lone Star tick)
Francisella tularensis Tularemia Ticks, rabbits, deer flies
Leptospira spp Leptospirosis Animal urine in water; recreational water use
Mycobacterium leprae Leprosy Humans with lepromatous leprosy; armadillo
(rare)
Pasteurella multocida Cellulitis, osteomyelitis Animal bite, cats, dogs
Rickettsia prowazekii Epidemic typhus Human to human via human body louse
Rickettsia rickettsii Rocky Mountain spotted fever Dermacentor (dog tick)
Rickettsia typhi Endemic typhus Fleas
Salmonella spp Diarrhea (which may be bloody), vomiting, Reptiles and poultry
(except S typhi) fever, abdominal cramps
Yersinia pestis Plague Fleas (rats and prairie dogs are reservoirs)
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