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"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."
}
]
} |