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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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A veterinary doctor had pyrexia of unknown origin. His blood culture in special laboratory media was positive for gram-negative sho bacilli which was oxidase positive. Which one of the following is the likely organism grown in culture ?
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The correct answer is  Ans. is 'd' i.e., Brucella Spp . The clues in this question are : - Gram negative - Oxidase postive - Organism can cause pyrexia of unknown origin (PUO) - Infection is common among veterinarians. . Brucellae have all these features. - Other options can be excluded by morphological features Organism Morhology . Brucella Cocci, cocobacilli or sho bacilli - Greenwood 16th/e p. 322 . Baonella spp. Small coccobacilii - Greenwood 16th/e p. 326 . Francisella spp. Small coccobacilli - Greenwood I 6th/e p. 335 . Pasteurella spp. Coccobacilli - Greenwood 16th/e p. 326 Amongst the given options only brucella can appear as sho bacilli, all others are coccobacilli.