IMMUNOGLOBULINS OF THE THOROUGHBRED FOAL FROM BIRTH UP TO SIX MONTHS OF AGE

Ciência Rural

Silva, Carlos Antonio Mondino²  Silva, José Henrique Souza da⁴  Corte, Flavio Desessards De La¹  Alda, Joaquin Lopez de³  Luz, Inês Nicoloso Castro da¹ 

[1] Universidade Federal de Santa Maria, Santa Maria;Haras Santa Maria de Araras;Universidade Federal de Santa Maria

关键词: foal;    immunoglobulin;    immunity;   

DOI  :  10.1590/S0103-84781992000100014

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Sixty Thoroughbred foals were divided into two groups according to the occurrence of clinical signs. Their sera Immunoglobulin (Ig) levels were evaluated from 3 hours up to 6 months of age. The ZST-test using either spectrophotometer or naked eye was a good indicator of Ig concentration determined by electrophoresis. Serum Ig decreased at the end of the first month both in healthy and sick foals, rising again after one to two weeks. This may indicate the passage from passive to own immune response. Minimal sera Ig levels of 400mg/dl suggested elsewhere is not compactible with healthy foals in this work. It is suggested here to set a new minimal level at 800mg/dl. This would be considered the minimal exigence when evaluating high risk foals, but should not be analised alone; there are strong evidences that husbandry measures and environmental conditions might play important roles in the process.

【 授权许可】

CC BY-NC