Lactational Response of Dairy Cows Inoculated with Live Adapted Rumen Microorganisms

Ultrasonography of the rumen of dairy cows

BACKGROUND This study describes the ultrasonographic findings of the rumen in 45 healthy dairy cows. RESULTS The cows were scanned on both sides using a 5.0 MHz transducer. The dorsal visible margin of the rumen ran parallel to the lung from cranioventral to caudodorsal. It was furthest from the dorsal midline at the 9th intercostal space (48.3 ± 9.24 cm) and closest at the 12th intercostal s...

Lactational and ruminal response of dairy cows to ten and twenty percent dietary newspaper.

Fif teen lactating Holstein cows in a 3 × 3 Latin square experiment determined effects of ground newspaper in the diet. Test components of the rations were: A) 20% cottonseed hulls; B) 10% paper and 10% cottonseed hulls; C) 20% paper. All animals received 2.3 kg of long alfalfa hay daily. Proximate analysis and gross energy determinations indicated that the paper rations contained more crude fi...

Modeling of Rumen Particle Dynamics in Dairy Cows Fed Sugarcane

Isolation and Identification of Uterine Microorganisms in Postpartum Dairy Cows

Uterine infection is a major problem in reproductive management and inefficient estrous detection. The bovine uterus is sterile before calving and the cervix provides a barrier against intrauterine invasion by pathogens during gestation1. Following calving, the uterus may become infected due to presence of infectious or non-specific microorganisms. Several bacterial, protozoan, viral and mycopl...

Feeding Rumen-Protected Choline to Transition Dairy Cows

Choline [(CH3)3N+CH2CH2OH], also known as trimethyl ethanolamine, is an essential component of mammalian diets as it is required for normal function of cells. It was discovered by Andreas Strecker in 1862, but it remained unrecognized as an essential nutrient for humans until 1998, when dietary reference intakes were established. Choline was initially determined to be essential in the preventio...