Immunoglobulin levels in large calf agglomerations

Area of Science:

• Veterinary Immunology
• Neonatal Calf Health
• Animal Husbandry

Background:

• Colostral immunity is vital for newborn calf survival.
• Understanding immunoglobulin (IG) level dynamics is key to preventing neonatal diseases.
• Calf management practices significantly impact disease susceptibility.

Purpose of the Study:

• To determine total immunoglobulin levels in calves from birth to 4 months.
• To identify critical periods of low immunity in young calves.
• To provide data for optimizing calf management and disease prevention.

Main Methods:

• Utilized the zinc sulphate turbidity test for quantifying total immunoglobulin levels.
• Monitored immunoglobulin levels in calves from birth up to 4 months of age.
• Assessed the incidence of hypogammaglobulinaemia during the study period.

Main Results:

• Total immunoglobulin levels decreased significantly after birth, reaching lowest points by weeks 3-4.
• A notable increase in immunoglobulin levels occurred around the fifth week of life.
• Hypogammaglobulinaemia affected 25% of calves in the first week and 50% by the third week.
• By two months of age, critically low immunoglobulin levels were rare.

Conclusions:

• Calves experience a period of vulnerability due to rapidly declining colostral immunity.
• Management of calf agglomerations should consider this immune gap, ideally delaying grouping until after the first month.
• Implementing individual housing for new arrivals in group settings and robust epizootological measures is essential for reducing infection transmission.