Misc Flashcards
Indolent endocarditis after valve replacement (catalase +, Gram + coccus). Tx?
S. epidermidis
Vancomycin
Aggressive endocarditis in IV drug abuser (Gram + coccus). Tx?
S. aureus
MSSA: oxacillin or naphcillin
MRSA: vancomycin
Indolent endocarditis after valve replacement (catalase -, Gram + coccus). Tx?
Viridans group strep (S. mutans or S. sanguinis)
penicillin or ceftriaxone
Which are the only enveloped nucleocapsid viruses to obtain their envelope from the nuclear membrane?
Herpesviruses
Which are the only DNA viruses to replicate in the cytoplasm? How is this possible?
Poxviruses. They bring their own DNA-dependent RNA polymerases.
Which are the only DNA viruses that are not icosahedral?
Poxviruses
Which are the only DNA viruses that have circular, not linear DNA?
Papilloma-, polyoma-, and hepadnaviruses.
Which are the non-enveloped viruses?
Naked CPR and PAPP smear.
Calici (e.g. Noroviruses)
Picorna
Reo (e.g. Rotavirus)
Parvo
Adeno
Papilloma
Polyoma
What are the viruses w/ segmented genomes?
All are RNA viruses: BOAR Bunya Orthomyxo Arena Reo
What are two Arenaviruses?
LCMV - lymphocytic choriomeningitis virus
Lassa fever encephalitis - spread by mice
What is tinea versicolor and what is the causative agent?
A cutaneous fungal infection that causes hypopigmented spot in immunocompetent individuals. Caused by Malasezzia furfur.
What is the microscopic appearrance of Malasezzia furfur?
spaghetti and meatballs - spores and hyphae
cigar butt hyphae
What is the Tx for pityriasis versicolor?
topical antifungals or selenium-containing shampoo (Selsun blue)
Which E. coli does not ferment sorbitol or have glucuronidase?
EHEC (O157:H7)
What is the mechanism of Shiga toxin?
Inhibits protein synthesis by cleaving 60S ribosome.
