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The Research Column

by Heinz Meissner

Click on any of the publications below to read more about the specific topic:

 

Title Date Discipline Extract Keywords
SAINFOIN SILAGE BENEFITS NITROGEN UTILIZATION, METHANE EMISSION AND MILK YIELD IN DAIRY COWS

Discipline: nutrition/feeding; Key words: sainfoin silage,

In vitro evaluation of a novel bacteriophage cocktail as a preventative for bovine coliform mastitis.

Discipline: mastitis; Key words: bacteriophage,

A STUDY TO LIMIT OFF-FLAVOURS IN NON-FAT DRY MILK AND MILK PROTEIN CONCENTRATE

Discipline: sensory; Key words: nonfat dry milk, milk protein concentrate, unit operations,

Microbiological quality of raw milk attributable to prolonged refrigeration conditions.

Discipline: contamination; Key words: raw milk quality, refrigerated storage, bacterial counts, proteolysis, psychrotrophic bacteria.
Effect of pasture versus indoor feeding systems on quality characteristics, nutritional composition, and sensory and volatile properties of full-fat Cheddar cheese.

Discipline: cheese; Key words: pasture, total mixed ration, Cheddar cheese, fatty acid.
Consumer acceptance of dairy products with a saturated fatty acid–reduced, monounsaturated fatty acid–enriched content

Discipline: dairy & health; Key words: cardiovascular disease, consumer acceptance, dairy product, monounsaturated fatty acid, saturated fatty acid. 
Impact of cows’ milk estrogen on cancer risk.

Discipline: dairy &health; Key words: oestrogens, dairy products, endometrial cancer, nutrients, meta-analysis. 
Pseudomonas fluorescens group bacterial strains are responsible for repeat and sporadic post-pasteurization contamination and reduced fluid milk shelf life.

Consumers complain about spoilage due to bacterial growth and spoilage also contributes to dairy product waste, which in a developing country we cannot really afford. We probably do not have figures in South Africa, but milk spoilage in the US amounts to $6.4 billion per year. Microbial spoilage is of particular concern and can be caused by either psychrotolerant spore formers, which likely originate from raw milk, or by post-pasteurization contamination (PPC).
A systematic review of the effects of prolonged cow–calf contact on behaviour, welfare, and productivity and A systematic review of the effects of early separation on dairy cow and calf health.

In the studies, primary research papers were found through targeted Web of Science searches, the reference lists of recent reviews for each topic, and the reference lists of papers identified from these sources. Studies were included if they were published in English, the full text was accessible, and they compared treatments with and without contact between dairy cows and calves for a specified period. The resulting manuscripts underwent a 4-step appraisal process, and further manuscripts were sourced from reference lists.
Genetic selection for bovine chromosome 18 haplotypes associated with divergent somatic cell score affects postpartum reproductive and metabolic performance.

Infectious diseases, such as metritis and mastitis, have  serious economic consequences due to the use of antibiotic treatment, the withdrawal period thereafter, delayed onset of cyclicity after calving, extended intervals between calving, and poor fertility . Most high-yielding dairy cows struggling with such diseases also have metabolic disorders, and some results have shown a connection between immunological defense and metabolic regulatory mechanisms.

 BTA18, somatic cell score, metritis, insulin-like growth factor-I