Abstract
Histophilus ovis was isolated from 29 sheep in 20 flocks and 2 artificial insemination (AI) centres in southern New South Wales from 1984 to 1990. The clinical and pathological findings were consistent with previous reports and included polyarthritis (7 flocks), epididymo-orchitis (5), meningoencephalitis (3), pneumonia (3), septicaemia (2), mastitis (1) and metritis (1). Six sheep had meningoencephalitis, a syndrome not previously associated with H ovis infection in sheep, which was similar pathologically to thromboembolic meningoencephalitis in cattle, caused by the related organism, Haemophilus somnus. H ovis was isolated from the semen of 12-month-old rams in a flock that had polyarthritis due to H ovis, in 4-month-old ram lambs and from the uterus of a ewe in a flock that had sporadic cases of H ovis septicaemia.
MeSH terms
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Animals
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Arthritis, Infectious / epidemiology
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Arthritis, Infectious / microbiology
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Arthritis, Infectious / pathology
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Arthritis, Infectious / veterinary
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Bacteremia / epidemiology
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Bacteremia / microbiology
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Bacteremia / pathology
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Bacteremia / veterinary
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Brain / microbiology
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Brain / pathology
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Disease Outbreaks / veterinary*
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Epididymitis / epidemiology
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Epididymitis / microbiology
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Epididymitis / pathology
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Epididymitis / veterinary
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Female
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Gram-Negative Bacteria / classification
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Gram-Negative Bacteria / isolation & purification*
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Gram-Negative Bacterial Infections / epidemiology
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Gram-Negative Bacterial Infections / microbiology
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Gram-Negative Bacterial Infections / pathology
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Gram-Negative Bacterial Infections / veterinary*
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Male
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Mastitis / epidemiology
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Mastitis / microbiology
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Mastitis / pathology
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Mastitis / veterinary
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Meningoencephalitis / epidemiology
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Meningoencephalitis / microbiology
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Meningoencephalitis / pathology
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Meningoencephalitis / veterinary*
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New South Wales / epidemiology
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Orchitis / epidemiology
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Orchitis / microbiology
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Orchitis / pathology
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Orchitis / veterinary
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Pneumonia / epidemiology
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Pneumonia / microbiology
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Pneumonia / pathology
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Pneumonia / veterinary
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Sheep
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Sheep Diseases / epidemiology*
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Sheep Diseases / microbiology
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Sheep Diseases / pathology