Fever, Stored Water and a Limited Budget: Sorting Out a Dengue Cluster
In a panchayat near Cuddalore, 60 households receive piped water on alternate days. The overhead tank was last cleaned three years ago and its lid is broken. Most families store water in open plastic drums inside the kitchen, and several drums have visible mosquito larvae. In the past ten days, four people have had high fever with body ache; a nine-year-old boy has a platelet count of 40,000 and is admitted in the taluk hospital. The village health nurse has two field days and one Anganwadi worker to help. The panchayat president wants to spend the available ₹8,000 on fogging only. Some mothers are giving papaya leaf juice to fever patients and have stopped giving them water because they believe it 'increases the fever'.
1. Identify the likely transmission pattern in this outbreak and rank three interventions for the ₹8,000. Justify the ranking rather than simply listing activities.
Read the worked answer
Reading the pattern. Fever with severe body ache and a platelet count of 40,000, together with larvae in stored water, points to dengue rather than a diarrhoeal water-borne disease. The vector is Aedes aegypti, which breeds in clean water stored inside homes and bites mainly during the day. The broken tank lid and open kitchen drums are therefore not merely hygiene problems; they are breeding sites.
Ranking for ₹8,000:
- Source reduction and safe storage (highest priority). Spend about ₹3,000 on lids, drum scrubbing brushes, and a community scrub day. Removing larvae attacks the breeding stage and gives lasting control.
- Tank repair, cleaning and chlorination (about ₹2,000). A broken lid on a shared tank keeps re-seeding the whole village; fixing it protects all 60 households at once.
- Fever surveillance and referral (about ₹1,500). Track new cases, advise ORS and fluids, warn against painkillers such as aspirin or ibuprofen, and refer immediately for bleeding, vomiting, or extreme weakness.
Fogging last (about ₹1,500 at most). Fogging kills only adult mosquitoes, gives brief relief, and does not touch larvae in drums. Spending the whole amount on fogging would look active while leaving the breeding sites intact.
Conclusion: the ranking follows the point of greatest leverage - larvae in household storage - not the most visible activity.
2. Design a 10-day awareness programme with only two staff and state one measurable indicator that the panchayat can use to judge success.
Read the worked answer
Plan with two staff (health nurse and Anganwadi worker):
- Days 1–2: School and Anganwadi sessions on the Aedes life cycle, using a drum and a lid as demonstration; map households with open storage.
- Days 3–6: House visits during morning and late afternoon biting hours; check drums, teach scrubbing of the inner rim, and fit lids.
- Day 7: Village scrub day - one fixed hour when every household empties, scrubs and dries its drums.
- Day 8: Visit households that did not participate; identify reasons (no lid, no space, water shortage).
- Day 9: Re-check 20 randomly selected drums for larvae.
- Day 10: Report to the panchayat and agree on a monthly scrub day.
Measurable indicator: the percentage of inspected households with covered, scrubbed drums and no visible larvae, with a target of at least 80% by Day 10. Counting drums, not counting meetings, keeps the programme honest. A second indicator - the number of new fever cases reported in the same period - helps but is slower to change, so it should not be the only measure.
3. How should the nurse respond to the beliefs that papaya leaf juice cures the fever and that drinking water is harmful? Give the reasoning behind the response.
Read the worked answer
The response should be respectful but firm, because both beliefs can cause harm.
On papaya leaf juice: there is no reliable evidence that it raises platelets or cures dengue. The real danger is that it may delay hospital referral when warning signs appear. The nurse can say, 'You are doing this because you want her to recover. The safest thing we know is fluids and watching for danger signs; if she vomits repeatedly, has bleeding gums, or becomes very weak, she must go to hospital at once.'
On withholding water: this is the more dangerous belief. Fever causes fluid loss, and dehydration worsens weakness and shock risk. The message should be practical: 'Water does not feed the fever. Small sips of water, ORS, rice gruel and coconut water help replace what the body is losing.'
Method matters. Lecturing mothers in front of others creates resistance. Ask a mother to demonstrate how much her child drank that day, praise what is already right, and involve her in teaching the next household. Provide ORS packets and a written danger-sign card in Tamil. The aim is not to win an argument but to change two specific behaviours: keep giving fluids and seek care early.