bacterial/febrile agglutination test Flashcards
these tests primarily use __ of bacteria to detect antibodies that are valuable in diagnosing infectious diseases, such as enteric or typhoid fever, typhus, and brucellosis
dye-treated suspensions
serologic test for the presumptive diagnosis of enteric or typhoid fever caused by the gram-negative bacilli salmonella typhi
widal test
test that detects the presence of specific antibodies and measures their capacity to react with the somatic and flagellar antigens of the bacterium
widal test
salmonella o
somatic
salmonella h
flagellar
negative
trace
1+
2+
3+
4+
t/f: the tube method is primarily used as a screening procedure. the slide method should be performed to confirm positive results obtained by the tube testing
f (rapis slide method is for screening, tube method is confirmatory)
significant titer in widal test
1:80
high or rising titer of O antigen is suggestive of
active indection of typhoid fever
high or rising titer of H antigen suggests
past infection, convalescence, past immunixation, exposure to an area where there is a prevalence of typhoid fever
high titers observed on all antigens denote
mixed infections
non-specific agglutination test; important screening tool for the diagnosis of typhus and other rickettsial infections
weil-felix test
it is based on the interaction between antigens from proteus ox species strains and cross-reactive agglutinins produced by patients with acute rickettsial infection
weil-felix test
one of the most common zoonoses that affect farmers, veterinarians, and slaughterhouse workers
brucellosis
usually transmitted through the ingestion of unpasteurized milk and milk products, skin contact with infected animal tissues, and droplet infection
brucellosis
significant titer in the weil-felix test
1:160
high titer of proteus ox19 and a weak reaction on proteus ox2 sugget typhus that may include (4)
brill’s disease, murine typhus, epidemic typhus, and rocky mountain spotted fever
high titer of proteus oxk suggests
scrub or tsutsugamushi fever
a titer above __ denotes active infection
1:80
