IDENTIFICATION OF SELECTED DISEASE AGENTS FROM CALVES ON COSTA-RICAN TROPICAL CLOUD-FOREST DAIRY FARMS

被引：3

作者：

HIRD, D ^{[1
]}

PEREZ, E ^{[1
]}

CABALLERO, M ^{[1
]}

RODRIGUEZ, L ^{[1
]}

VELAZQUEZ, J ^{[1
]}

机构：

[1] UNIV NACL AUTONOMA, SCH VET MED, HEREDIA, COSTA RICA

来源：

PREVENTIVE VETERINARY MEDICINE | 1990年 / 9卷 / 03期

关键词：

D O I：

10.1016/0167-5877(90)90068-S

中图分类号：

S85 [动物医学（兽医学）];

学科分类号：

0906 ;

摘要：

Rotavirus, K99+ E. coli and coccidia were identified from feces of 10%, 13% and 37% of 300 selected dairy calves ≤3 months of age, and from 26%, 36% and 45% of 42 Costa Rican dairy farms, respectively. Calf breeds were Holstein 68%, Jersey 27% and other breeds 5%. Median calf ages at identification of rotavirus, K99+ E. coli and coccidia were 14.5, 15, and 3 days, respectively. Differences between isolation rates for the wet and dry season were not statistically significant for any of the three agents. Prevalence of antibodies against infectious bovine rhinotracheitis and bovine parainfluenza-3 virus were 7% and 82%, respectively, for selected calves. Of calf sera tested for immunoglobulins, 9.5% were negative. © 1990.

引用

页码：221 / 231

页数：11