Typhoid and Paratyphoid Pathogens
Bacterium causing typhoid fever.
Salmonella Typhi
First specimen type collected during the acute phase.
Blood
Primary culture medium for Salmonella isolation.
Blood agar
Widal test measures antibodies against these antigens.
O and H antigens
Which fever pattern often associated with typhoid.
step-ladder fever
Bacterium causing paratyphoid fever.
Salmonella Paratyphi
Specimen collected in chronic carriers of typhoid.
Stool
Selective medium often used for Salmonella detection.
MacConkey agar
Which Antigen detected by rapid typhoid tests.
Vi antigen
Which Gastrointestinal symptom commonly seen in typhoid.
Diarrhea
Group classification of Salmonella Typhi based on serology.
Group D
Optimal sample for detecting typhoid during later stages.
Stool or urine
Diagnostic method using DNA amplification.
PCR
Characteristic morphology of Salmonella on Gram staining.
Gram- negative rods
Skin finding in typhoid patients
Rose spots
Group classification of Salmonella Paratyphi A.
Group A
Preferred site for Salmonella culture in asymptomatic carriers.
Bile
Serological test for typhoid in resource-limited settings.
Widal test
Widal test results show a significant rise in which antibodies for typhoid.
anti-O and anti-H antibodies
Typhoid complication involving in which perforation.
intestinal perforation
Serovar of Salmonella with no flagella
Salmonella Typhi
Specimen used for typhoid diagnosis when blood isn’t available.
Bone marrow aspirate
Laboratory technique for detecting Salmonella antigens.
ELISA
Number of days blood culture is typically observed for typhoid.
7 days
Liver and spleen findings in typhoid cases.
hepatomegaly and splenomegaly