Dengue Cluster in a Peri-Urban Ward: Triage, Vector Control, and Reporting
Over 10 days, 12 people in three adjoining lanes of a peri-urban ward have presented to the subcenter with fever above 38°C, severe headache, and body ache. Four have platelet counts below 100,000/µL, and one 9-year-old boy has bleeding gums. The area has had intermittent rain and daytime temperatures around 32°C. During a home visit, the ANM finds discarded tyres, plastic drums, and coconut shells holding stagnant water behind several houses. Only two of the 12 cases have been reported to the district surveillance unit. The medical officer is away, and the ANM must act with the available multipurpose worker and ASHA.
1. What case definition and warning signs would you use to identify suspected dengue in this cluster, and how would you triage the 12 patients?
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A suspected dengue case is an acute febrile illness with two or more of: headache, retro-orbital pain, myalgia, arthralgia, rash, bleeding manifestations, or leukopenia, in a person living in or visiting this ward. Warning signs include bleeding gums, persistent vomiting, severe abdominal pain, lethargy, fluid accumulation, or a rapid fall in platelet count. I would triage the boy with bleeding gums and any patient with warning signs to immediate referral, not home care. The remaining patients need daily review, full blood counts, and clear instructions to return if warning signs appear. I would keep a line list with name, age, address, date of onset, and platelet count so that the cluster can be tracked.
2. Describe the immediate vector-control and community measures you would organise at the subcenter level, including who does what.
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With the MPW and ASHA, I would organise source reduction: search the three lanes for containers, empty and scrub drums and tyres, and cover or dispose of them. Where water cannot be emptied, apply temephos or introduce larvivorous fish with the vector-control team. I would plan a community clean-up on a fixed day, involve the ward member, and use loudspeaker announcements and home visits to explain that Aedes aegypti breeds in clean stagnant water and bites during the day. I would assign the ASHA to follow up the cases and the MPW to coordinate with the municipal vector team; I would keep the subcenter open later for fever patients.
3. What reporting and referral actions are required, and what would you advise families about medicines for fever?
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I must notify the district surveillance unit under IDSP immediately-the cluster and the unreported cases require urgent reporting. I would refer the boy with bleeding gums to the district hospital with a referral note. For fever, I would advise paracetamol only, and warn against aspirin, ibuprofen, and other NSAIDs because of bleeding risk. I would tell families to give oral fluids, watch for warning signs, and return immediately if they appear. I would document the advice and the referral, and follow up the unreported cases.