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E K Barbour N H Nabbut W M Frerichs H M Al-Nakhli A A Al-Mukayel 《Tropical animal health and production》1985,17(3):173-179
The correlation between camels' milk samples collected from abnormal inflamed udders and samples positive in the California Mastitis Test (CMT) was +0.803 (P less than 0.01). The bacterial count ranges of milk samples differed significantly (P less than 0.05) for those with a negative CMT and those with a positive CMT. Infection with many but not all bacterial species was associated with positive CMT results. The highest percentage of camel milk samples was included in the bacterial count range of 3.0 x 10(2) to 3.0 x 10(3) cfu/ml rather than in the greater than 3.0 x 10(3) cfu/ml range for most of the bacterial species. The most predominant bacterial isolates were Micrococcus spp., Staphylococcus aureus, Streptococcus spp. and Corynebacterium spp. followed by eight other flora. Chloramphenicol was the most effective antimicrobial agent of six tested against 118 bacterial isolates. Preliminary observations are made on chemotherapy of mastitis cases in camels. 相似文献
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Production of H2S by Escherichia coli isolated from poultry: an unusual character useful for epidemiology of colisepticemia 总被引：2，自引：0，他引：2
Eleven isolates of H2S-producing Escherichia coli were recovered from necropsy materials of chickens with symptoms and lesions of colisepticemia on Saudi Arabian broiler farms. Results of 19 out of 20 biochemical reactions studied were typical for E. coli. Hydrogen sulfide production by the E. coli isolates was used as an epidemiological marker to pinpoint a breeding farm as the probable source of these strains, which were then transferred to progeny farms, where colisepticemia occurred. This finding was confirmed by the presence of the same antigenic structure (O78:H-) and by the same drug-resistance pattern (a multiple resistance to streptomycin, sulfathiazole, and tetracycline) in the isolates. 相似文献
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Barbour E.K. Nabbut N.H. Hamadeh S.K. Al-Nakhli H.M. 《Veterinary research communications》1997,21(6):421-430
Barbour, E.K., Nabbut, N.H., Hamadeh, S.K. and Al-Nakhli, H.M., 1997. Bacterial identity and characteristics in healthy and unhealthy respiratory tracts of sheep and calves. Veterinary Research Communications, 21 (6), 421-430The aim of this study was to compare different bacteriological aspects of the respiratory systems of healthy (H) versus unhealthy (UH) animals with respiratory signs. The prevalence of different bacterial species was determined in the upper and lower respiratory tract of H and UH Najdi sheep, Somali sheep and Holstein calves. The characteristics of Pasteurella spp. isolates, and the biotype of Pasteurella haemolytica were identified in H and UH animals. Eighteen out of 28 (64.3%) of the identified bacterial species in the upper respiratory tract were more prevalent in the nasal cavities of UH Najdi and Somali sheep and Holstein calves with respiratory signs than in apparently healthy animals; four of the most prevalent bacteria in the upper respiratory system of UH sheep were Moraxella spp., Pseudomonas pseudomallei, Erysipelothrix spp., and Pasteurella multocida, while three of the most prevalent bacteria in UH calves were Pasturella haemolytica, Actinomyces spp., and Pseudomonas aeruginosa. The prevalence of six different bacterial species was greater in the lungs of UH animals, namely Actinomyces pyogenes, Erysipelothrix spp., P. haemolytica, Pasteurella ureae, Staphylococcus aureus, and Staphylococcus epidermidis, which could be risk factors in the complexity of the prevalent respiratory diseases of the animals surveyed.Of the biochemical, cytological and colonial characteristics studied in the identified P. haemolytica and P. multocida, two characters were significantly different (p < 0.05) in organisms isolated from UH as compared to those from H animals. These were the higher loss of haemolytic power by the strains of P. haemolytica and the decreased fermentation of trehalose by all the strains of P. multocida recovered from healthy animals.The only biotype of P. haemolytica isolated from H animals was biotype A, while both biotypes A (88.0% of the isolates) and T (12.0% of the isolates) were recovered from UH animals. 相似文献
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E. K. Barbour N. H. Nabbut W. M. Frerichs H. M. Al-Nakhli A. A. Al-Mukayel 《Tropical animal health and production》1985,17(4):173-179
Summary The correlation between camels' milk samples collected from abnormal inflamed udders and samples positive in the California
Mastitis Test (CMT) was +0·803 (P<0·01). The bacterial count ranges of milk samples differed significantly (P<0·05) for those with a negative CMT and those with a positive CMT. Infection with many but not all bacterial species was
associated with positive CMT results. The highest percentage of camel milk samples was included in the bacterial count range
of 3·0×102 to 3·0×103 cfu/ml rather than in the >3·0×103 cfu/ml range for most of the bacterial species. The most predominant bacterial isolates wereMicrococcus spp.,Staphylococcus aureus, Streptococcus spp. andCorynebacterium spp. followed by eight other flora. Chloramphenicol was the most effective antimicrobial agent of six tested against 118
bacterial isolates. Preliminary observations are made on chemotherapy of mastitis cases in camels.
Resumen Le correlación entre las muestras de leche de camello colectadas de ubres iflamadas, y las muestras positivas según la prueba California para mastitis (PCM) fue +0.803 (P<0.01). El conteo bacterial en las mucotras difirió significativamente (P<0.05) para aquellas con una prueba California negativa y aquellas con una positiva. Se asociaba la infección con muchas, pero notodas los tipos de bacteria con resultados PMC positivos. El porcentaje más alto de muestras de leche de camello se incluyó en el rango del conteo bacterial de 3.0×102−3.0×103 cfu/ml, más bien que en el rango >3.0×103 cfu/ml para la mayoría de especies bacteriales. Las bacterias aisladas fueronMicrococcus sp.,Staphylococcus aureus, Streptococcus sp. yCorynebacterium sp. seguidas por otras bacterias menos importantes. El agente antimicrobiano más efectivo fue el cloranfenicol, de seis ensayados contra 118 aislamientos bacteriales. Se hacen observaciones preliminares, sobre quimioterápia de casos de mastitis en camellos.
Résumé Le corrélation entre les échantillons de lait de chamelle recueillis de mamelles anormalement enflammées et les échantillons entrant dans la gamme subclinique du California Mastitis Test (CMT) était de +0,803 (P<0,01). Le dénombrement total de bactéries en les échantillons différaient de fa?on significative (P<0,05) pour les échantillons avec un CMT négatif et ceux avec un CMT positif. Infection avec de nombreuses mais pas toutes espèces bactériennes était associée avec des CMT positifs. Le pour-centage le pluys élevé d'échantillons de lait de chamelle se situait dans une gramme de nombre de bactéries allant de 30×102 à 3,0×103 Unités/colonie/ml plut?t que dans une gamme supérieure à 3,0×103 Unités/colonie/ml en ce qui concerne la majorité des espèces de bactéries. Les bactéries isolées le plus souvent étaientMicrococcus sp.,Staphylococcus aureus, Streptococcus sp. etCorynebacterium sp. suivies de huit autres espèces de bactéries. Le Chloramphenicol était l'agent antibactérien le plus efficace parmi les six testés sur cent dix huit isolats bactériens. Des observations préliminaires sur la chimiothérapie des cas de mammites chez les chamelles sont faites.相似文献
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Bacteriological examination of hatchery waste eggs, identification of the isolated bacteria, and susceptibility testing against seven antimicrobial agents were used in an attempt to establish a rational basis for reducing bacterial infections in newly hatched chicks. Chloramphenicol at 1000 ppm was selected as the antibiotic for preliminary dipping trials and 0.45% iodophore (Wescodyne) was added for later trials. The control treatment consisted of formaldehyde fumigation. The following conclusions can be drawn: Hatchery waste eggs are highly contaminated (69.1%) and enterobacteriaceae predominate (26.6%). Chloramphenicol is the most effective antimicrobial tested. Dip treatments with either chloramphenicol alone or chloramphenicol plus Wescodyne result in a reduced percentage of abnormal navels (8.4% and 10.4%), as compared with 21.9% for the control treatment. Hatchability of either group of dipped eggs is reduced in comparison with fumigated eggs. Dip treatment with chloramphenicol plus Wescodyne significantly reduces the anal carrier rates for Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., and Staphylococcus aureus. This treatment reduces the incidence of bacterial infection in abnormal navels to zero. 相似文献
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Use of epidemiologic markers to identify the source of Escherichia coli infections in poultry 总被引：3，自引：0，他引：3
During an epidemiologic study of poultry colisepticemia on 2 Saudi Arabian poultry broiler farms, Escherichia coli was isolated from 101 (40.4%) of the 250 specimens examined. The antigenic structure and the drug resistance pattern of 65.4% of the E coli isolates from different sources were used as epidemiologic markers to trace the source of the infection. The predominant E coli serotypes involved in infections of 2 poultry broiler progeny farms were 033:H4 (51.8%) and 078:H- (19.6%) that had the following respective drug resistance patterns: furazolidone-streptomycin-sulfathiazole and streptomycin-sulfathiazole-tetracycline. Escherichia coli strains with typical epidemiologic markers were isolated from various sources on a broiler breeding farm, but not from well waters of the infected progeny farm. Three other E coli serotypes (045:H10[14.3%], 0119:H27[1.8%], and 0145:H25[1.8%]) were involved in poultry infection, but to a lesser extent. These 3 serotypes were multiply resistant against 5 to 6 of the antimicrobials evaluated. 相似文献
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