{ "schema_version": "1.0", "level": "species", "genus": "Aerococcus", "species": "viridans", "overview": { "short": "Aerococcus viridans is a Gram-positive, catalase-negative coccus historically associated with environmental and opportunistic infections.", "clinical_context": "Less frequently isolated than other Aerococcus species; may be recovered from blood or wound cultures." }, "expected_fields": { "Gram Stain": "Positive", "Shape": "Cocci", "Motility": "Negative", "Capsule": "Variable", "Spore Formation": "Negative", "Haemolysis": "Variable", "Haemolysis Type": "Alpha", "Media Grown On": [ "Blood Agar" ], "Colony Morphology": [ "Small", "Grey", "Alpha-haemolytic" ], "Oxygen Requirement": "Facultative Anaerobe", "Growth Temperature": "30//37", "Catalase": "Negative", "Oxidase": "Negative", "Indole": "Negative", "Urease": "Negative", "Citrate": "Negative", "Methyl Red": "Unknown", "VP": "Unknown", "H2S": "Negative", "DNase": "Negative", "ONPG": "Unknown", "Coagulase": "Negative", "Gelatin Hydrolysis": "Negative", "Esculin Hydrolysis": "Negative", "Nitrate Reduction": "Negative", "NaCl Tolerant (>=6%)": "Negative", "Lipase Test": "Negative", "Lysine Decarboxylase": "Unknown", "Ornithine Decarboxylase": "Unknown", "Ornitihine Decarboxylase": "Unknown", "Arginine dihydrolase": "Negative", "Glucose Fermentation": "Positive", "Lactose Fermentation": "Variable", "Sucrose Fermentation": "Variable", "Maltose Fermentation": "Variable", "Mannitol Fermentation": "Negative", "Sorbitol Fermentation": "Negative", "Xylose Fermentation": "Negative", "Rhamnose Fermentation": "Unknown", "Arabinose Fermentation": "Negative", "Raffinose Fermentation": "Unknown", "Trehalose Fermentation": "Variable", "Inositol Fermentation": "Negative", "Gas Production": "Negative", "TSI Pattern": "Unknown", "Colony Pattern": "Unknown", "Pigment": "None", "Motility Type": "None" }, "species_markers": [ { "field": "Clinical Relevance", "value": "Lower", "importance": "medium", "notes": "Less commonly implicated in invasive disease." } ], "common_confusions": [ { "genus": "Streptococcus", "reason": "Alpha-haemolytic colonies may mimic viridans streptococci." } ], "when_to_question_identification": [ "Strong clinical UTI association suggests Aerococcus urinae.", "Growth in high salt suggests Enterococcus." ], "recommended_next_tests": [ { "test": "MALDI-TOF MS", "reason": "Required for reliable species-level identification." } ] }