MICROBIOLOGY VIRUSES cumulative Flashcards
This is a (+) RNA bunyavirus w/ 3 helical segments
Hantavirus
What causes a rash from the forehead down? A rash from behind the ears and down?
Forehead down is german measles, behind the ears and down is measles
There are rapid tests for which 3 causes of pharyngitis?
Monospot, Rapid strep, and Rapid test for influenza virus
Aside from Hantavirus what other 2 pathogens are notable for being localized to desert southwest?
Plague and Coccidiodes
What is the etiology of the most common cause of pharyngitis?
Mostly from rhinovirus and that is from POST-NASAL DRIP from the rhinitis
This is a (+) RNA virus that is enveloped and replicates at 33 C
CORONAVIRUS –THE ENVELOPE
What is the mechanism of pathogenesis of a virus in which Hx of travel to Hong Kong or Toronto is significant?
This is SARS and the mechanism of pathogenesis is unknown
Adamantines are effective against which type of influenza?
Type A only
What are features of Rhinovirus and what family of viruses does it belong to?
It is a naked, + RNA virus that is icosahedral and replicates at 33 C, it is a picornavirus
What are the features of coronavirus?
It is an enveloped +RNA virus, that grows at 33 C
How is hantavirus transmitted?
By inhaling mouse droppings
This is a picornavirus, (+) RNA and icosahedral that CAN replicate at 37 C
Coxsackie A virus
What are 2 paramyxoviruses that affect the respiratory tract?
Mumps and Measles and both are RNA viruses
What are the features of influenza virus?
(-) RNA virus with segmented genome that is enveloped
Which strains of influenza cannot undergo antigenic shift? Why not?
Influenza B and C cannot do shift b/c they ONLY AFFECT HUMANS
Why are fomites more important for rhinovirus transmission than coronavirus?
Rhinovirus is a naked virus (+) RNA picornavirus
How do you differentiate adenovirus from influenza?
Adenovirus is a DNA virus and Influenza is a (-) RNA virus
What are the two picornaviruses that affect the respiratory tract? What is the major difference in terms of replication?
Rhinovirus and Coxsackie virus–both are (+) stranded RNA viruses but rhinovirus only grows at 33 C
It’s December, dude’s got a rhinitis and hacking cough, what receptor did the virus bind to?
Sialic acid, he’s got the flu and influenza binds to sialic acid
What are the features of SARS?
It is a (+) RNA coronavirus that is enveloped
Why do Amish kids get epiglottitis more so than most kids?
Because the most common cause of epiglottitis is H. influenza B which we vaccinate against, but Amish don?t get vaccines