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| Streptococcus pyogenes pneumonia in rabbits - short communication - DVM Costin Stoica |
A "German giant" rabbits breeder reported occasionally deads without significant clinical signs. He brougt
a dead female for investigations.
Necropsy revealed fibrinous and haemorrhagic pneumonia with 2-3 mm, haemorrhagic spots on the left
lung and large fibrin deposits on the right lung.
a dead female for investigations.
Necropsy revealed fibrinous and haemorrhagic pneumonia with 2-3 mm, haemorrhagic spots on the left
lung and large fibrin deposits on the right lung.
API 20 Strep biochemical tests:
Alkaline phosphatase, leucine aminopeptidase,
acidification of lactose, trehalose, raffinose, and starch
were positive.
Voges-Proskauer test, hyppurate hydrolysis, esculin
hydrolysis (beta-glucosidase), pyrolidonyl arylamidase,
alpha-galactosidase, beta-galactosidase,
beta-glucuronidase, arginine dihydrolase, acidification of:
arabinose, ribose, mannitol, sorbitol, inulin, and glycogen
were negative.
Alkaline phosphatase, leucine aminopeptidase,
acidification of lactose, trehalose, raffinose, and starch
were positive.
Voges-Proskauer test, hyppurate hydrolysis, esculin
hydrolysis (beta-glucosidase), pyrolidonyl arylamidase,
alpha-galactosidase, beta-galactosidase,
beta-glucuronidase, arginine dihydrolase, acidification of:
arabinose, ribose, mannitol, sorbitol, inulin, and glycogen
were negative.
ABIS online software result was Streptococcus pyogenes 83% (with a question mark on the negative pyrolidonyl arylamidase,
arginine dihydrolase and acidification of raffinose).
Streptoccus strain was sensible to Penicillin, Phosphomycin, Doxycycline, Lincomycin+Spectinomycin, Oxitetracycline, Florfenicol,
Amoxicillin, intermediate to Erithromycin and resistant to Gentamycin, Colistin sulphate and Sulphamethoxazole+Trimethoprim.
arginine dihydrolase and acidification of raffinose).
Streptoccus strain was sensible to Penicillin, Phosphomycin, Doxycycline, Lincomycin+Spectinomycin, Oxitetracycline, Florfenicol,
Amoxicillin, intermediate to Erithromycin and resistant to Gentamycin, Colistin sulphate and Sulphamethoxazole+Trimethoprim.
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(c) Costin Stoica
| R E G N U M PROKARYOTAE |
A Streptococcus pyogenes strain has been isolated from the right lung. Bacteriological exam from liver,
heart and bone marrow was negative.
Morphological and biochemical properties of the strain:
Gram-positive cocci, grouped in long chains.
After 24 h incubation at 37 ºC, on 5% sheep blood agar colonies were pinpoint, <1 mm in diameter,
beta-hemolytic. No growth on MacConkey agar. Low turbidity and thin deposit in nutrient broth. Aerobic and
anaerobic growth. Catalase negative. Oxidase positive.
heart and bone marrow was negative.
Morphological and biochemical properties of the strain:
Gram-positive cocci, grouped in long chains.
After 24 h incubation at 37 ºC, on 5% sheep blood agar colonies were pinpoint, <1 mm in diameter,
beta-hemolytic. No growth on MacConkey agar. Low turbidity and thin deposit in nutrient broth. Aerobic and
anaerobic growth. Catalase negative. Oxidase positive.
| Streptococcus pyogenes |
| Lung petechiae |
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| Fibrin deposits |