Catalase positive

Alcaligenes faecalis: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

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Alcaligenes faecalis growth on MacConkey agar

Introduction Alcaligenes faecalis is a Gram-negative, aerobic, rod-shaped bacterium primarily found in water and soil, but also as a commensal in the human intestinal tract. While it is generally nonpathogenic, it is a significant opportunistic pathogen, particularly in hospital settings where it thrives in moist …

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Rothia kristinae: Introduction, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

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R. kristinae in Gram-stained culture microscopy shows irregular, pleomorphic Gram-positive bacilli, ranging from short rods to e

Introduction Pathogenicity While typically considered a low-grade commensal, it causes serious infections primarily in immunocompromised patients or those with indwelling medical devices.  Lab Diagnosis Treatment There are no official clinical breakpoints, so treatment is often guided by expert consultation and raw Minimum Inhibitory Concentration (MIC) values.  Prevention Keynotes …

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