This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NVBDCP, NLEP, Subject name: Social & Preventive Medicine
[{'content': 'Health worker must visit all houses in his area to check for malaria case:- \nSelect and explain. \nA. Weekly, B. Fonight, C. Monthly, D. Yearly', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A health worker (MPW-male) must visit all houses in his area once every fonight (2 weeks) to look for any fever case in last 15 days. If a case of fever is found then a slide of such case is prepared at his home and sent to PHC for fuher analysis. EXTRA EDGE: Active case detection (ACD): Done in rural areas with blood smears collected by MPWs/ANM during fonightly house visits. Passive case detection (PCD): Done in fever cases repoing to peripheral health volunteers/ ASHAs, at sub-centres, malaria clinic, CHC & other secondary, teiary level health institutions that patients visit for treatment. ASHA & other volunteer workers provide diagnostic services by RDTs ; at PHCs by examination of blood smears.', 'role': 'assistant'}]