Screening for neonatal isohemolytic anemia in calves

Area of Science:

• Veterinary Immunology
• Ruminant Health
• Neonatal Calf Diseases

Background:

• Anaplasmosis vaccination is common in cattle.
• Neonatal isohemolytic anemia (NIA) is a significant cause of calf mortality.
• Maternal antibodies can contribute to neonatal diseases.

Purpose of the Study:

• To investigate the correlation between anti-erythrocytic immunoglobulins in vaccinated cows and the incidence of NIA in their calves.
• To assess the predictive value of these immunoglobulins for NIA occurrence.
• To evaluate a preventative strategy for NIA.

Main Methods:

• Serum and colostrum samples from 124 anaplasmosis-vaccinated cows were analyzed.
• Saline agglutination tests were used to detect anti-erythrocytic immunoglobulins.
• Correlation analysis was performed between immunoglobulin levels and NIA occurrence in calves.

Main Results:

• Positive results for anti-erythrocytic immunoglobulins were detected in vaccinated cows.
• A significant correlation was found between these antibodies and the occurrence of NIA in calves.
• Withholding colostrum from high-risk calves effectively prevented NIA.

Conclusions:

• Anti-erythrocytic immunoglobulins resulting from anaplasmosis vaccination pose a risk for NIA in calves.
• Testing for these antibodies can predict NIA susceptibility.
• Colostrum management is a viable strategy to prevent NIA in at-risk calves.