PREVALENCE AND ETIOLOGY OF SUBCLINICAL MASTITIS IN EWES OF SOUTHERN GREECE

被引:147
作者
FTHENAKIS, GC
机构
[1] Greek Army Centre for Biological Research, Athens
关键词
SUBCLINICAL MASTITIS; SHEEP; GREECE;
D O I
10.1016/0921-4488(94)90078-7
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
In a field investigation of ovine mastitis in eight flocks in Southern Greece, a population of 760 dairy ewes was monitored during lactation. The prevalence of subclinical mastitis was 4.5% on the 1st sampling (at weaning of lambs), 11.2% on the 2nd sampling (2 to 3 weeks later) and 16.9% on the 3rd sampling (6 to 8 weeks after the second sampling). Although the prevalence of subclinical mastitis increased as the lactation period advanced, the risk rate of the disease decreased. Coagulase-negative staphylococci (Staphylococcus epidermidis, Staph. simulans, Staph. chromogenes, Staph. xylosus) were the main causal agents of the disease, but Staph. aureus, streptococci, Bacillus spp., Escherichia coli, Pasteurella haemolytica and Actinomyces pyogenes were also isolated from cases of subclinical mastitis. Of the 1084 milk samples collected, somatic cell counts more than 1.0 x 10(6) cells/ml were found in 97 (8.9%); 64 were bacteriologically positive, but 33 bacteriologically negative.
引用
收藏
页码:293 / 300
页数:8
相关论文
共 28 条
[1]  
Al-Samarrae, Sharma, Yousif, Mastitis in sheep in Iraq, Vet. Rec., 116, (1985)
[2]  
Armitage, Statistical Methods in Medical Research, (1971)
[3]  
Booth, Cell counts mean money, Proceedings of the 1990 British Mastitis Conference, pp. 2-7, (1990)
[4]  
Booth, Cell counting in milk, Vet. A., 15, pp. 47-49, (1975)
[5]  
Bor, Winkler, Gootwine, Non-clinical intramammary infection in lactating ewes and its association with clinical mastitis, Br. Vet. J., 145, pp. 178-184, (1989)
[6]  
Cowan, Cowan and Steel's Manual for the Identification of Medical Bacteria, (1974)
[7]  
El-Masannat, Ovine Mastitis with Special Reference to Mastitis caused by Pasteurella Haemolytica, PhD Thesis, (1987)
[8]  
El-Masannat, Jones, Scott, The experimental production of mastitis in sheep by intramammary inoculation of Pasteurella haemolytica, J. Comp. Path., 105, pp. 455-465, (1991)
[9]  
Fthenakis, Ovine Mastitis with Special Reference to Subclinical Mastitis associated with Coagulase-Negative Staphylococci, PhD Thesis, (1988)
[10]  
Fthenakis, El-Masannat, Booth, Jones, Somatic cell counts of ewes' milk, Br. Vet. J., 147, pp. 575-581, (1991)