Other Bacteria Flashcards
Undulating fever due to contaminated dairy
Brucellosis
Tx doxycycline + rifampicin
Tularemia
Francisella Tularensis
Tx Streptomycin or gentamicin
Gram (-) rods w/ bipolar (safety pin) staining causing bubonic, pneumonic and septicemic plague
Yersinia pestis
Tx. Streptomycin and tetracycline
Most virulent bacteria
Yersinia pestis
Gram (-) encapsultated rod forming buttery colonies with musty odor
Animal bites and osteomyelitis
Pasteurella multocida
Tx. Pen G
Aerobic, acid fast rods grown in Ziehl-Neelsen
Mycobacterium tuberculosis
Assay used for mycobacterium drug resistance
Luciferase assay
Most important virulence factor in Mycobacterium
Cord factor
Virulence factor in Mycobacterium that prevents phagosome-lysosomal fusion
Exported repetitive protein (sulfatides->surface glycolipids
Virulence factor in Mycobacterium that elicits delayed hypersensitivity
Tuberculin surface proteins
Primary complex in PTB
Ghon’s complex
Radiologically detectable colonization (Ranke’s complex)
Reactivation Tuberculosis
Simon’s Focus
CXR: Cicatricial changes, subpleural blebs, cavitations
Secondary colinzation w/ A. fumigatus
Positive Mantoux test for Low risk population
> 15 mm
Positive Mantoux test for HIV+, AIDS, old TB Immunocompromise population
> 5 mm
Positive Mantoux test for High risk population
> 10 mm
Most common extrapulmonary for of TB
Scrofula (TB Lymphadenitis)
Other uses of BCG vaccine aside from TB prevention
Adjunct treatment for bladder CA
Causes pulmonary disease in immunocompromised host (AIDS patient with CD4<50)
Mycobacterium Avium-intracellulare complex (MAI, MAC)
Prophylaxis: Azithromycin
Aerobic, acid fast rods w/c can’t be cultured in vitro and causes neural disease w/ dermatologic manifestation
Mycobacterium leprae
Leprosy with hypopigmented plaques, thickened superficial nerves, and significant anesthesia
Tuberculoid Leprosy
Tx. Dapsone and rifampin
Leprosy with leonine facies, erythema nodosum leprosum
Lepromatous leprosy
Tx. dapsone, rifampin and clofazimine
DOC for erythema nodosum leprosum
Thalidomide
Condition associated with a hard nontender swelling with sinus tracts draining sulfur granules in a setting of broken jaw or dental extraction
Actinomycosis (lumpy jaw)
Tx. Pen G + drainage
African with unilateral swelling of the jaw. Think of ?
Burkitt’s, Lymphoma, EBV
Gram (+) aerobic acid fast (Fite-Faraco- stain) which causes mycetomas and lung and brain abscesses (orange colonies)
Nocardia asteroides, Nocardiosis
Tx. TMP-SMX
Smallest free living organism
Mycoplasma Pneumoniae
Manifest as broad based ataxia, (+) romberg, charcot joints, stroke w/o hypertension
Tertiary Syphilis
Tertiary syphilis
Gummas Neurosyphilis - tabes dorsalis - dementia paralytica Aortitis --> endarteritis
Manifest with snuffles/saddle nose; mulberry molars; hutchinson triad, saber shins, higoumenakis sign, clutton’s joints, pulmonary hemorrhage
Congenital syphilis
Hutchinson triad
Hutchinson teeth, deafness, keratitis
Detection for Primary syphilis
Dark field microscopy
Detection for Secondary & Tertiary syphilis
RPR/VDRL
Largest medically important bacteria
Borrelia burgdorferi
Lyme disease is transmitted through
deer ticks (Ixodes scapularis)
Pathognomonic sign: Erythema chronicum migrans
Lyme Disease
Stage of lyme disease with autoimmune migratory polyarthritis (onion skin lesions),acrodermatitis chronica atrophicans
Stage 3
Stage of lyme disease with myocarditis (AV block), meningitis and bells palsy
Stage 2
Lyme Disease
BAKE a Key Lyme pie Bell's palsy Arthritis Kardiac block Erythema chronicum migrans
DOC for lyme disease
Early: Doxycycline
Late: IV penicillin or ceftriaxone
Relapsing fever
Borrelia recurrentis
Tx Tetracycline
Shepherd’s crook
Leptospira interrogans
Obligate intracellular bacteria
Cell wall lacks muramic acid
Grown in cycloheximide culture
Chlamydia Trachomatis
Obligate intracellular bacteria
Chlamydia Trachomatis
Ricketssia
Chronic keratoconjunctivitis progressing to scarring and blindness
Trachoma
Chlamydia trachomatis
Etiologic type of trachomatis that cause trachoma
C. trachomatis types A-C
Etiologic type of trachomatis that cause genital tract infection
C. trachomatis types D-K
Etiologic type of trachomatis that cause neonatal pneumonia
C. trachomatis types D-K
Etiologic type of trachomatis that cause lymphogranuloma venereum
C. trachomatis types L1-L3
Papule or vesicular w/c ulcerates and leads to suppurative inguinal lymphadenitis (buboes)
(+) Frei test
Lymphogranuloma venereum
DOC of Chlamydia infections STD Conjunctivitis LGV Psittacosis
STD Azithromycin
Conjunctivitis Erythromycin
LGV Doxycycline
Psittacosis Azithromycin
Condition where there is sudden onset pneumonia w/ malaise, fever, anorexia, sore throat, photophobia, severe headache
(+) bird exposure (bird fancier’s disease)
Psittacossis
(+) Weil-Felix reaction
Rickettsiae
Cat scratch fever in immunocompetent individuals
Bacillary angiomatosis in immunocompromise individuals
Bartonella henselae
Reservoir dogs
forms morulae in cytoplasms of monocytes
Ehrlichia chaffeensis
Messenteric Adenitis (pseudoappendicitis)
Yersinia enterocolitica
Granuloma Inguinale (Donovanosis)
Klebsiella granulomatis
small painless papule ulcerates to form beefy red ulcers with velvety surface
pseudobuboe formation
Granuloma Inguinale (Donovanosis)