Alterations in Blood Markers, Rumen Fermentation, and Microbiota Due to Heat Stress in Holstein Cows During the Dry Period and Early Lactation

Ye Pyae Naing, Seon-Ho Kim · 2026

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Description

Ye Pyae Naing and Seon-Ho Kim report a 2026 study of heat stress in Holstein dairy cows in Korea, comparing the dry period with early lactation. Fourteen cows were observed during hot August weather, when heat load peaks. Blood and rumen fluid samples showed how metabolism, digestion, and microbes responded at each stage.

Cows in early lactation carried lower energy-related substances in blood but higher markers of energy use and stress. Their blood cell patterns suggested a different immune posture as well. Rumen fermentation in the early-lactation group produced more of certain energy-yielding acids, and microbial communities shifted. The authors conclude that freshly calved cows face the greater metabolic strain under heat, so cooling and feeding strategies should prioritize that stage.

Catalog record

CREATORYe Pyae Naing, Seon-Ho Kim
YEAR2026
COLLECTIONPAPERS
FORMATTXT
FILE SIZE48 KB
VERSION1.0
LICENSECC BY 4.0
RIGHTSCC BY
SOURCEEurope PMC

Source: https://europepmc.org/articles/PMC13255732

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