CBSE 2026 · Region 1 · Set 3 · Q17 · 2 marks
A health officer visiting two different regions reported the following symptoms in patients :
Region A - Sustained high fever with stomach pain, constipation and loss of appetite.
Region B - Inflammation in the lower limbs and genital organs.
Name the diseases likely affecting the patients in regions A and B. Write the scientific name of the causative organisms in both the cases.
Marking-scheme solution
• Disease
Region A-Typhoid
Region B – Filariasis/Elephantiasis
• Causative organism
Region A– Salmonella typhimurium
Region B – Wucheraria bancrofti / Wucheraria malayi
Human Health and DiseaseCommon Diseases in HumansRemembervery_short_answermedium
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.