Mastitis in goats in two breedings from the view point of five-year observation
1998
Elecko, J. (Ustav Experimentalnej Veterinarnej Mediciny, Kosice (Slovak Republic))
Incidence of clinical mastitis was investigated in two breedings of goats under different conditions during 1993-1997. On the specialized farm "N" with a mean number of 120 Slovak White goats with stabilized breeding and hygienic standard, the incidence of clinical mastitis had a yearly and inter-yearly decreasing tendency. The period from delivery to weaning appeared to be a dominant period of the incidence. A decrease in mastitis in breeding was pronounced from May to July up to October as well as from the beginning to end of observation: e.g. from July 1993 to 1997 it was 6.5 to 2.3%, which may be ascribed to the gradual improvement of conditions. In the breeding group "S" with 260 Alpine goats, without experience in goat breeding, 17 cases of clinical mastitis were recorded in the first year of observation, whereas the incidence culminated only a year later with 24 cases. The first 14 days of milking were the most critical in the mastitis incidence; in 1994, however, it was the period from delivery to weaning. Two cases were recorded on average during the machine milking to the end of the breeding season over the 4 years of observation. Prevalence at three examinations in year decreased in group S from 1993-1994. In 1995, it stabilized at 6.5% or 6.3%. In 1996, the prevalence was highest (6.4%) in the second examination in July. Despite decreasing numbers of positive bacterial findings in individual years, the proportion of S. aureus in the total isolation in the N group increased from 65.2% in 1993 to 88.9% in 1997. In the S group it was 68.5% to 89.2%. Culled and dead goats formed a loss of 60.1% in group N and 82.1% in group S of the total numbers of the individuals affected with clinical mastitis
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