study questins Flashcards
(34 cards)
explain how a patient can test negative for RSV on the Sofia but positive on the Cephid
the cephid is more sensitive than the sofia. the sofia is an immunofluorescence assay for RSV antigen
specimen and swab type for sofia Flu & RSV? media?
nasopharyngeal swab in 1 mL viral transport media
what should be done if the flu A & B were both positive on the Sofia?
invalid/indeterminate. notifying ordering physician and suggest ordering a 4-plex
if only one swab for rapid group A strep, what must be done prior to the assay being performed?
culture the swab first on SSA
what food can interfere with group A strep results?
cheese doritos
what is the specimen swab type for the 4-plex &/or single covid testing? media?
nasopharyngeal swab in 3 mL viral transport media, universal media, or home brew
what are the 4 viruses that are being tested for in the 4-plex?
RSV, Flu A, Flu B, covid
what secondary testing is performed in a positive C. diff from an inpatient sample? what does this secondary test tell the physician?
C. diff quick check. tells the provider if the patient has an active infection or if they are colonized with the bacteria (a carrier)
when do we call inpatient positive MRSA>
always- get the patient into isolation
what specimen type is used for enterovirus testing?
CSF
what is the specimen collection type for RPA? media?
nasopharyngeal in 1-3 mL viral transport media
specimen type for GIP? media?
stool in cairy-blair
how long do you have to inoculate infinity cartridges once opened?
30 mins
how long do you have to load the infinity cartridges once inoculated?
60 mins
which transport media will allow for N. gonorrhea to remain viable until the specimen can be cultured?
Eswab, amines with charcoal, anaerobic swab
a specimen arrives on a dry swab. can we do the culture?
no, a dry swab will not keep the organisms viable
extra media is used to plate a CF culture if the specimen is received on an Eswab?
SSA
an anaerobic culture on an abdominal wound is found in the fridge, is the specimen acceptable?
no, all anaerobic cultures need to be stored at room temp. Cold kills anaerobes
media used for a stool culture?
CNA, HE, MAC, MAC with sorbitol, SS, GN broth
chocolate agar contains which factors?
X & V
what patient population is most likely to be infected with Burkholderia cepacia?
CF patients
what media is used for a TB culture?
Lowenstein-Jensen slant, MGIT tube
what is the best agar to use to isolate N. gonorrhea?
MTM
list 3 media slants used to culture fungus and what temp/environment they incubate at
SAB-HI, inhibitory mold, mycobiotic slant @ room temp
