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Update data/rag/knowledge_base/Bergeyella/genus.json

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data/rag/knowledge_base/Bergeyella/genus.json CHANGED
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  {
 
 
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  "genus": "Bergeyella",
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- "taxonomy": {
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- "family": "Weeksellaceae",
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- "order": "Flavobacteriales",
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- "class": "Flavobacteriia",
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- "phylum": "Bacteroidota"
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  },
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- "overview": "Bergeyella is a genus of fastidious, oxidase-positive, non-motile Gram-negative rods within the family Weeksellaceae. Organisms in this genus are environmental or zoonotic, and rarely associated with human infection. Bergeyella zoohelcum is the only well-established species of clinical relevance, predominantly causing infections following dog or cat bites or licking.",
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- "key_traits": [
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- "Gram-negative rods (thin, fusiform or elongated)",
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- "Oxidase positive",
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- "Catalase positive or weak",
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- "Non-motile",
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- "Fastidious: poor growth on routine media",
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- "No growth or very weak growth on MacConkey agar",
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- "Indole negative",
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- "ONPG negative",
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- "Does not grow in 6.5% NaCl",
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- "Prefers blood or chocolate agar with CO₂"
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- ],
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- "ecology": "Found in the oral microbiota of dogs and cats. Human isolates are almost exclusively zoonotic in origin, typically following animal bites or licking of minor wounds.",
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- "pathogenicity": "Causes soft tissue infections, cellulitis, tenosynovitis, septic arthritis, and occasional bacteremia following dog or cat exposure. Infections are usually localized and treatable with β-lactam antibiotics.",
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- "genus_level_biochemistry": {
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- "general_tendencies": [
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- "Oxidase strongly positive.",
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- "Non-motile.",
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- "Indole negative.",
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- "ONPG negative.",
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- "Little to no growth on MacConkey.",
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- "No growth in high-salt conditions.",
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- "Slow growth—colonies appear after 48–72 hours."
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  ],
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- "non_definitive_tests": [
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- "Carbohydrate fermentation patterns are unreliable due to fastidious growth.",
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- "Hemolysis patterns vary and do not define the genus."
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- ]
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- },
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- "genus_differentiation": {
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- "from_close_genera": [
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- "Pasteurella multocida grows robustly on blood agar and is indole positive; Bergeyella is indole negative and slower growing.",
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- "Capnocytophaga are gliding motile and fusiform; Bergeyella is non-motile.",
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- "Weeksella species may appear similar but differ biochemically and ecologically.",
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- "Moraxella are oxidase positive but grow more readily and are diplococcoid.",
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- "Neisseria species are diplococci, not rods."
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  ],
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- "key_rag_filters": [
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- "Dog or cat exposure → strongly pushes toward Bergeyella zoohelcum or Pasteurella.",
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- "Oxidase positive + non-motile + poor MacConkey growth → favors Bergeyella.",
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- "Indole negative → pushes away from Pasteurella toward Bergeyella.",
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- "Fastidious slow growth → distinguishes from Pasteurella, Neisseria, Moraxella."
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- ]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  },
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- "diagnostics": {
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- "typical_lab_findings": [
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- "Thin Gram-negative rods or fusiform cells",
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- "Slow-growing colonies on blood or chocolate agar",
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- "Oxidase positive, catalase variable",
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- "No/poor growth on MacConkey",
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- "Non-motile"
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- ],
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- "important_tests": [
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- "Oxidase test",
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- "Indole test",
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- "Growth characteristics on MacConkey",
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- "CO₂-enriched incubation",
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- "MALDI-TOF MS"
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- ],
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- "confirmation_methods": [
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- "MALDI-TOF MS (highly accurate for this genus)",
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- "16S rRNA sequencing",
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- "Clinical correlation with animal exposure"
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- ]
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  },
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- "notes": "Part of the HACEK-adjacent group of fastidious Gram-negative rods but not included in HACEK. Zoonotic association is one of the strongest clues.",
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- "references": [
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- "Manual of Clinical Microbiology",
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- "Case reports of Bergeyella zoonotic infections",
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- "Flavobacteriales taxonomy reviews"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  ]
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- }
 
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  {
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+ "schema_version": "1.0",
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+ "level": "genus",
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  "genus": "Bergeyella",
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+
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+ "overview": {
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+ "short": "Bergeyella species are fastidious, Gram-negative, non-motile short rods within the Flavobacteriaceae, most commonly associated with animal bite wounds.",
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+ "clinical_context": "Primarily isolated from dog and cat bite infections, with rare cases of bacteremia and endocarditis."
 
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  },
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+
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+ "expected_fields": {
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+ "Gram Stain": "Negative",
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+ "Shape": "Short Rods",
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+ "Motility": "Negative",
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+ "Capsule": "Negative",
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+ "Spore Formation": "Negative",
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+ "Haemolysis": "Negative",
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+ "Haemolysis Type": "None",
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+ "Media Grown On": [
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+ "Blood Agar",
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+ "Chocolate Agar"
 
 
 
 
 
 
 
 
 
 
 
 
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  ],
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+ "Colony Morphology": [
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+ "Small",
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+ "Smooth",
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+ "Grey"
 
 
 
 
 
 
 
 
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  ],
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+ "Oxygen Requirement": "Aerobic",
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+ "Growth Temperature": "30//37",
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+ "Catalase": "Positive",
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+ "Oxidase": "Positive",
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+ "Indole": "Positive",
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+ "Urease": "Negative",
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+ "Citrate": "Negative",
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+ "Methyl Red": "Unknown",
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+ "VP": "Unknown",
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+ "H2S": "Negative",
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+ "DNase": "Negative",
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+ "ONPG": "Negative",
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+ "Coagulase": "Negative",
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+ "Gelatin Hydrolysis": "Negative",
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+ "Esculin Hydrolysis": "Negative",
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+ "Nitrate Reduction": "Negative",
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+ "NaCl Tolerant (>=6%)": "Negative",
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+ "Lipase Test": "Negative",
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+ "Lysine Decarboxylase": "Negative",
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+ "Ornithine Decarboxylase": "Negative",
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+ "Ornitihine Decarboxylase": "Negative",
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+ "Arginine dihydrolase": "Negative",
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+ "Glucose Fermentation": "Negative",
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+ "Lactose Fermentation": "Negative",
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+ "Sucrose Fermentation": "Negative",
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+ "Maltose Fermentation": "Negative",
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+ "Mannitol Fermentation": "Negative",
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+ "Sorbitol Fermentation": "Negative",
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+ "Xylose Fermentation": "Negative",
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+ "Rhamnose Fermentation": "Negative",
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+ "Arabinose Fermentation": "Negative",
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+ "Raffinose Fermentation": "Negative",
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+ "Trehalose Fermentation": "Negative",
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+ "Inositol Fermentation": "Negative",
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+ "Gas Production": "Negative",
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+ "TSI Pattern": "Unknown",
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+ "Colony Pattern": "Unknown",
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+ "Pigment": "None",
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+ "Motility Type": "None"
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  },
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+
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+ "field_notes": {
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+ "Indole": "Indole positivity is a key clue separating Bergeyella from many other bite-associated organisms.",
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+ "Growth": "Slow-growing and often missed on routine culture without prolonged incubation."
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  },
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+
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+ "key_differentiators": [
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+ {
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+ "field": "Indole",
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+ "expected": "Positive",
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+ "distinguishes_from": ["Capnocytophaga", "Pasteurella"],
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+ "notes": "Indole positivity is unusual among many bite-associated Gram-negative rods."
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+ },
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+ {
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+ "field": "Oxidase",
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+ "expected": "Positive",
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+ "distinguishes_from": ["Haemophilus"],
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+ "notes": "Helps differentiate Bergeyella from oxidase-negative fastidious organisms."
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+ }
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+ ],
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+
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+ "common_confusions": [
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+ {
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+ "genus": "Capnocytophaga",
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+ "reason": "Shared association with animal bites and fastidious growth."
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+ },
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+ {
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+ "genus": "Pasteurella",
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+ "reason": "Similar clinical context and Gram-negative morphology."
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+ }
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+ ],
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+
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+ "when_to_question_identification": [
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+ "Failure to recover organism after prolonged incubation.",
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+ "Fermentative metabolism observed.",
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+ "Motility detected."
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+ ],
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+
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+ "recommended_next_tests": [
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+ {
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+ "test": "MALDI-TOF MS",
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+ "reason": "Most reliable routine method for identifying Bergeyella.",
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+ "api_kit": "Not applicable"
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+ },
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+ {
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+ "test": "16S rRNA sequencing",
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+ "reason": "Definitive identification for rare or atypical isolates."
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+ }
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+ ],
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+
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+ "supported_species": [
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+ "zoohelcum"
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  ]
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+ }