Read before you practise · 3 min
Read Vector Diseases by Agent and Mosquito
Separate the pathogen from its vector, then identify the general prevention step.
NSEB · Human Health and Disease · 3 linked questions · 100% coverage
Know this first
Living-system questions are solved by matching a structure or organism to its function, process and stated condition.
Structure · The part being namedFunction · What that part doesCondition · The situation that changes the answer
Study deeper: NCERT Biology · Human Health and Disease
Match disease, agent and vector
Dengue is caused by an RNA virus and is transmitted by female Aedes mosquitoes. Lymphatic filariasis is caused by Wuchereria; the keyed vector here is female Culex.
Prevent transmission at its source
The broad public-health measure is to control vectors and remove breeding sites. Screens, insecticides and larvivorous fish can help in specific settings, but they are parts of wider vector management.
OlympIQ exam lens
- ✓Dengue: RNA virus → female Aedes.
- ✓Filariasis: Wuchereria → female Culex in this question.
- ✓Vector and pathogen are different parts of the transmission pair.
- ✓Control vectors and breeding places as a general prevention strategy.
OlympIQ trap
Read “caused by” and “spread by” as two separate blanks: one asks for pathogen, the other for vector.
Ready to try the pattern?
100% coverage across the 3 linked questions.
Practise 3 linked questionsSign in to practise — your XP, streak and analysis update as you solve.