Moraxella spp: Gram negative coccobacilli that grow in pairs or short chains 4. Of most concern would be neiserria meningitidis 3 Neiserria spp: Gram negative cocci that occur singly or more commonly in pairs. Gram negative cocci and coccobacilli are unusual findings in blood cultures and can represent a wide range of possible infections when they are seen. How to use this guideline: Support interaction with microbiology staff (not replace interaction with microbiology staff).īack to top Bacteriological differential diagnosis (Gram guideline only) The blood culture process: Timings of culture, identification, susceptibility tests and clinical liaison. Support ward doctors in treating and investigating bacteraemic patients.Support communication of Gram stain results from microbiologists to ward doctors.Provide education to junior microbiology registrars.Please contact Microbiology for further advice regarding investigations and/or treatment following the systemic review, if required.īack to top Gram stain: Gram negative Cocci & coccobacilli Aim The differential diagnosis for gram negative coccobacilli in particular is extensive and requires a thorough systemic review of the patient. The finding of a Gram negative coccus or coccobacillus in a blood culture is unusual. This document is supplementary to, and should be used in conjunction with, the antimicrobial guidelines. This document provides guidelines for doctors on the management of patients with confirmed bacteraemias (blood cultures). Department of Microbiology Bacteraemia guideline Gram negative cocci & coccobacilli
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