This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'A female presents with leaking and meconum stained liquior at 32 weaks. She is infected with \nSelect and explain. \nA. CMV, B. Listeria, C. Toxoplasma, D. Herpes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: “Discolored brownish or meconium stained amniotic fluid is common with fetal infection, even with preterm gestation”\nHence, the correct answer is Listeria, rest of the infections do not lead to preterm labour with meconium stained liquor.\nListeriosis\n\nCausative organism- listeria monocytogenes (facultative intracellular gram positive bacillus)\nMode of infection- Food-borne infection caused by eating food like raw vegetables, Coleslaw, Apple cider, Melons, Milk, Fresh mexican style cheese, Smoked fish, Processed foods.\n\nClinical features\n\nCan be asymptomatic\nCan cause febrile illness.\n\nMaternal complications which can occur due to listeria infection are:\n\nPreterm labor,\nChorioamnionitis,\nMenonium stained liquor,\nAbortions,\nPlacental Macroabscesses\n\nMaternal infection can lead to fetal infection characterised by:\n\nDisseminated granulomatous lesions with microabscess in skin\nStillbirth\nOverall perinatal mortality-50%.\n\nManagement\n\nDrug of choice is combination of Ampicillin + gentamicin or in case of pencillin allergy – Trimethoprim sulfamethoxazole\nMaternal treatment may be effective for fetal infection\nThere is no vaccine for listeriosis.', 'role': 'assistant'}]