[2025-10-01T10:13:22.247184] [QUERYOME] Starting research for query 1405: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Transmission of HIV from mother to child is prevented by all the following except: 

Options:
{'A': 'Oral zidovudine to mother at 3rd trimester along with oral zidovudine to infant for 6 weeks', 'B': 'Vitamin A prophylaxis to mother', 'C': 'Vaginal delivery', 'D': 'Stopping breast feed'}'
[2025-10-01T10:13:22.309999] [PI] Starting research for query: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Transmission of HIV from mother to child is prevented by all the following except: 

Options:
{'A': 'Oral zidovudine to mother at 3rd trimester along with oral zidovudine to infant for 6 weeks', 'B': 'Vitamin A prophylaxis to mother', 'C': 'Vaginal delivery', 'D': 'Stopping breast feed'}'
[2025-10-01T10:13:22.312790] Saving text to bench_final/run1/medmcqa/medmcqa_1404/pi_initial_prompt.txt
[2025-10-01T10:13:22.335937] [PI] Calling o3 for initial analysis...
[2025-10-01T10:13:34.609740] [PI] Reasoning iteration 1
[2025-10-01T10:13:34.612677] [PI reasoning] **Analyzing HIV prevention strategies**

I’m examining options for HIV mother-to-child transmission prevention. Oral zidovudine for the mother and infant does prevent transmission, while vitamin A prophylaxis is not proven effective and could increase risk. Vaginal delivery does not prevent transmission, unlike elective C-section. The question asks which method does NOT prevent transmission. Both vitamin A prophylaxis and vaginal delivery are options, but I need to confirm that I’m correctly identifying the one that poses a risk. So, I’ll conclude that vitamin A prophylaxis is the best choice.
[2025-10-01T10:13:34.614349] [PI] Executing function call 1: hybrid_search
[2025-10-01T10:13:34.618927] [PI] Function arguments: {'query': 'maternal vitamin A supplementation does not reduce mother to child transmission of HIV', 'k': 10, 'faiss_weight': 0.5, 'bm25_weight': 0.5, 'use_rrf': True}
[2025-10-01T10:13:34.620512] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-10-01T10:13:48.422695] [PI] Function hybrid_search executed successfully
[2025-10-01T10:13:48.424632] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-10-01T10:13:48.432705] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T10:13:57.494364] [PI] Reasoning iteration 2
[2025-10-01T10:13:57.497131] [PI] Executing function call 1: hybrid_search
[2025-10-01T10:13:57.499677] [PI] Function arguments: {'query': 'transmission of HIV from mother to child is prevented by all except vaginal delivery medical mcq', 'k': 10, 'faiss_weight': 0.4, 'bm25_weight': 0.6, 'use_rrf': True}
[2025-10-01T10:13:57.514619] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_2_tool_call_2_hybrid_search.json
[2025-10-01T10:14:34.611296] [PI] Function hybrid_search executed successfully
[2025-10-01T10:14:34.614208] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_2_tool_result_2_hybrid_search.json
[2025-10-01T10:14:34.622521] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T10:14:44.723546] [PI] Reasoning iteration 3
[2025-10-01T10:14:44.725294] [PI] Executing function call 1: hybrid_search
[2025-10-01T10:14:44.728235] [PI] Function arguments: {'query': '"vitamin A prophylaxis" mother HIV MCQ except', 'k': 10, 'faiss_weight': 0.3, 'bm25_weight': 0.7, 'use_rrf': True}
[2025-10-01T10:14:44.730077] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_3_tool_call_2_hybrid_search.json
[2025-10-01T10:15:05.295135] [PI] Function hybrid_search executed successfully
[2025-10-01T10:15:05.300003] Saving JSON to bench_final/run1/medmcqa/medmcqa_1404/pi_iteration_3_tool_result_2_hybrid_search.json
[2025-10-01T10:15:05.313327] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T10:15:23.112238] [PI] Reasoning iteration 4
[2025-10-01T10:15:23.113909] [PI reasoning] **Evaluating vitamin A supplementation**

The search results indicate that vitamin A supplementation isn’t effective and could increase risk, with the exception being for prophylaxis. Regarding exams, vaginal delivery isn’t protective either; while viral suppression allows for it, it’s not a prevention method. In low-resource settings, the focus is on avoiding breastfeeding and using preventative measures. Ultimately, I’d lean toward choosing vitamin A prophylaxis, although it hasn’t been proven beneficial. Vaginal delivery carries some risk, making it essential to consider these factors carefully.
[2025-10-01T10:15:23.115817] [PI] No function calls found in response
[2025-10-01T10:15:23.120809] [PI] No more function calls - research complete
[2025-10-01T10:15:23.123344] Saving text to bench_final/run1/medmcqa/medmcqa_1404/pi_final_answer.txt
[2025-10-01T10:15:23.129462] [QUERYOME] Query completed successfully
