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: Microbiology
[{'content': 'A 23 year old male patient presented with abrupt onset of fever, headache and myalgia followed by petechial rash and ahritis 2 to 10 days after exposure to a rat bite. He is diagnosed with Rat-bite fever. What is the causative organism of this disease? \nSelect and explain. \nA. Klebsiella granulomatis, B. Eikenella corrodens, C. Streptobacillus moniliformis, D. Erysipelothrix rhusiopathiae', 'role': 'user'}, {'content': "Answer: C \nExplanation: Streptobacillus moniliformis is a gram negative, non motile, non capsulated and highly pleomorphic sho bacillus. They causes rat - bite fever. In man, organism enter through the wound caused by bite of rat. When infection is acquired by ingestion of food, milk/ water contaminated with excreta of rat it is known as Haverhill fever or Erythema ahriticumepidemicum. This is characterised by fever, polyahritis and petechial rash. Good to know: Klebsiella granulomatis causes donovanosis. Eikenella corrodens causes oppounistic infections. Erysipelothrix rhusiopathiae causes erysipelas. Ref :Ananthanarayanan & Paniker's ed- 8th pg 39.", 'role': 'assistant'}]