microbiology Flashcards
Erythema Infectiosum / Fifth disease caused by Parvovirus B19
strawberry tounge associated with Scarlet fever and Kawasaki’s disease
Erythema Chronicum Migrans: Large rash with Bullseye appearance. From Ixodes Tick associated with Borrelia and Lyme disease
Giardia Lamblia:
Trophozoite form
Cause of Giardiasis: Bloating, flatulence, foul smelling diarrhea
transmitted by cysts in Water,
tx: Metronidazole
IgA protects against
Giardia Lamblia:
Cyst form found in Stool
Assoc with Giardiasis.
IgA normally protects against Giardia, deficient individuals are susceptible.
Nocardia:
Weakly (partially) Acid fast, Branching filamentous, Aerobic, Urease positive, Catalase positive
Tx: Sulfanomides (TMP-SMX)
Babesiosis:
Babesia Microti, Ixodes Tick, Northeastern united States
Fevers, Fatigue, Myalgias, Headache, Flu-like symptoms
Intraerythrocytic, Pleomorphic ring forms, with occasional Maltese Cross (tetrad)
Cryptococcus Neoformans:
Visualized on indian-ink staining (transparent capsule)
Dx: Lumbar puncture showing elevated opening pressure with low glucose & increased protein
Culture on Sabrouds Agar
Tx: Amphotericin B & Flucytosine
Neisseria Gonnorhea:
Gram negative, intracellular, DIPLOCOCCUS with Polymorphonuclear Lymphocytes
2nd most common STD in US following Chlamydia (co-infection possible)
Tx: Ceftriaxone, Azithromycin
untreated progresses to prostatitis or epidydimitis in men, UTI in women
Bacillary Angiomatosis:
Benign proliferation of Blood cells forming tumor-like masses on the skin and organs. (mistaken of Kaposi Sarcoma)
Caused by Bartonella Henslae (cat scratch/bite or ticks and fleas
Associated w HIV
Entamoeba Hystolitica:
Anaerobic Protozoan,
Cyst in water with “Cartwheel” distribution with 4 nuclei
Tx: Metronidazole in the liver
Nitromidazle in the intestine
Entamoeba Hystolytica Trophozoite form:
RBC inclusions and distinct nuclei
Amoebiasis
Sx: Bl;oody diarrhea, liver abscess, hypoechoic lesion in the liver
Flask shaped ulcers with overhanging edges.
Sporotrichosis:
Rose gardeners Dz, Dimorphic fungus
Subcutaneous nodules/ ulcers ascending
up the lymphatics
TX: Potassium iodide, Itraconazole, terbinafine, fluconazole
tx diseeminated: Amp B
Paracoccidioimycosis:
Cells covered in budding blastocondida, Dimorphic
“Captains wheel” formation
Latin America
Sx: Painful lesions on lips and on Oral mucosa, weight loss, fever cought
Tx: Sulfanomides, Itraconazole, Amp B
C perfringens
Double zone of hemolysis
caused by lecithinase