Evaluation of Colostrum Components and Milking Status Affecting Colostrum IgG Concentration
Shuji Kayasaki,
Hitomi Satoh,
Keitaro Oguchi,
Kyoko Chisato,
Rika Fukumori,
Shin Oikawa
Affiliations
Shuji Kayasaki
Nijibetsu Livestock Clinic, Kushiro Central Branch, East Regional Center, Hokkaido Agricultural Mutual Aid Association, 103-1, Line 67, Nijibetsu Genya, Shibecha-cho 088-2461, Hokkaido, Japan
Hitomi Satoh
Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu-shi 069-8501, Hokkaido, Japan
Keitaro Oguchi
Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu-shi 069-8501, Hokkaido, Japan
Kyoko Chisato
Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu-shi 069-8501, Hokkaido, Japan
Rika Fukumori
Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu-shi 069-8501, Hokkaido, Japan
Shin Oikawa
Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu-shi 069-8501, Hokkaido, Japan
This study investigated IgG concentrations, bacterial contamination, and nutrient components of colostrum on dairy farms in eastern Hokkaido, Japan, to examine the factors making it possible to obtain high-quality colostrum. Colostrum samples were collected from 266 Holstein cows. The general criteria for high-quality colostrum are an IgG concentration of 50 g/L or higher and a total plate count of less than 100,000 CFU/mL. The percentage of samples with the criteria for IgG concentration was low, at 48.9%, but the percentage with the criteria for total plate count was high, at 86.5%. The colostrum Brix value was significantly correlated with the colostrum IgG concentration (r2 = 0.233, p p p < 0.01). The results suggest that, in addition to estimating the colostrum IgG concentration via the Brix value, the likelihood of obtaining high-IgG colostrum is increased by taking into account parity, milking volume, and time from calving to milking.
