alleryThe **Widal test** is used for diagnosis of:
AMalaria
BTyphoid (caused by *Salmonella typhi*)
CTuberculosis
DAIDS
Answer & Solution
Correct answer: B. Typhoid (caused by *Salmonella typhi*)
**Widal test:** detects agglutinating antibodies (anti-O, anti-H) against *Salmonella typhi*/*paratyphi* antigens in patient serum.
Useful 7-10 days after symptom onset.
**Modern alternative:** blood culture, IgM ELISA.
Keep practising Unit 8Q: Toxicology, Environmental Hazards & Health
Browse all Unit 8Q: Toxicology, Environmental Hazards & Health questions for AP Biology, or explore more Biology topics.
Related questions
Granulocytes among WBCs includePlasma without clotting factors is calledHepatic portal system carries blood fromNormal resting blood pressure of a healthy adult is approximatelyThe first heart sound ('lub') is produced byThe pacemaker of the human heart is thePersons with blood group O are calledWhich leucocyte is the MOST abundant in human blood?