Fatty acid profile of milk for determining reproductive status in lactating Holstein Friesian cows

Abstract

Large percentages of dairy cows do not express behavioural signs of oestrus. Faecal and urine fatty acid concentrations increase during oestrus. The objective of the present study was to determine the milk FA profile of dairy cows during the oestrous and dioestrous periods and the relationship with behavioural signs on the day of oestrus. The activity of 32 Holstein Friesian cows was measured continuously using GEA Rescounter ll pedometers (GEA Farm Technologies, Düsseldorf, Germany) and IceQubes (IceRobotics Ltd., Edinburgh, UK). Milk samples were collected on the day of oestrus and on day 14 of the subsequent oestrous cycle and analysed for FA concentration using gas chromatography (GC) and milk composition was also determined. All cows were artificially inseminated within 12 h of the onset of oestrus. On the day of oestrus, the concentration of acetic acid (P<0.001), valeric acid (P=0.016), caproic acid (P<0.001) and myristoleic (P = 0.035) were greater in milk compared to day 14. On day 14 milk arachidonic acid concentration, however, was greater (P = 0.004) compared to the day of oestrus. Also, on day 14 arachidonic acid concentration was greater (P = 0.002) in nonpregnant compared to pregnant cows. In conclusion, the results of this study indicate there are changes in the concentrations of some milk FA during oestrus and dioestrus in lactating dairy cows.

Staphylococcus Pasteuri (BCVME2) Resident In Buffalo Cervical Vaginal Mucus (CVM) - A Potential Source of Estrus-Specific Sex Pheromone(s)

“…It is known that short-chain fatty acids such as acetic-, propanoic-and butyric acid, are relatively abundant due to bacterial fermentation in colonic lumen which regulate entero-pathogenic colonization by host immunomodulation in human (Smith et al 2013;Wrigley 2004). A recent study shows that acetic, valeric, caproic and myristoleic acids are at signi cantly higher levels in the milk of estrus cow (Zebari et al 2019). The fatty acids, acetic and propanoic, have been identi ed in the faeces of cow, and varied in relation to the time of ovulation (Mozūraitis et al 2017).…”

Influence of Estrus on the Milk Characteristics and Mid-Infrared Spectra of Dairy Cows

“…It is well documented that milk composition alters with the occurrence of estrus [ 8 , 9 , 10 ]. Importantly, the present study indicated that the days in relation to estrus had a significant effect on many infrared wavenumbers.…”

“…Specific fatty acids, such as myristic acid and palmitic acid, decreased from proestrus to estrus with a concomitant increase in stearic acid and oleic acid. Zebari et al [ 9 ] found that the concentration of acetic acid, valeric acid, caproic acid, and myristoleic were greater in milk on the day of estrus compared to the diestrus period, whereas the milk arachidonic acid concentration was greater in the diestrus period compared to the day of estrus. Zhao et al [ 10 ] showed that inactive-ovary cows compared with normal-estrus cows at 70 days postpartum had an increase in the milk whey of six different metabolites, including succinate, creatine phosphate, glycine, myo-inositol, glycolate, and orotate, and a decrease in the milk whey of seven metabolites, including alanine, creatinine, o-phosphorylcholine, lactose, taurine, galactose, and glucose-1-phosphate.…”

Octanoic acid promotes clearance of antibiotic-tolerant cells and eradicates biofilms of Staphylococcus aureus isolated from recurrent bovine mastitis

“…Octanoic acid is a saturated fatty acid present in natural food sources, such as coconut, palm kernel and milk [ 10 ]. It exhibits antibacterial activity against various species, including S. aureus , Escherichia coli and Candida albicans [ [11] , [12] , [13] , [14] , [15] , [16] , [17] ].…”