The objective of this study was to determine the relationships among daughter intramammary infections at first parturition and sire transmitting abilities for somatic cell score, udder type traits, productive life, and protein yield. Quarter milk samples from 958 daughters (in eight Pennsylvania herds and one Nebraska herd) of 182 Holstein sires were collected within a few days of first calving...

In one study, milk samples from individual mammary quarters (n = 4,148) in seven spring-calving dairy herds in Ireland were collected on two occasions during lactation to measure somatic cell counts (SCCs). All quarters were scored (0 to 4) for teat-end hyperkeratosis to establish a correlation between this score and SCC. In a second study, a herd of 56 autumn-calving Holstein/Friesian dairy co...

Mammary gland quarters of 139 lactating dairy cows from small-scale dairy herds were examined visually and by palpation for teat lesions and by California mastitis test (CMT) and bacterial culture for subclinical mastitis. Teat lesions were observed in 97 teats. These included teat chaps (39.2%), teat papillomas (23.7%), teat erosions (22.7%), teat fistulae (5.1%), inverted teats (5.1%) and blo...

An epidemiologic study was conducted on 581 dairy cows (indigenous and its crosses 371, exotic crosses 210) of 4 government establishments to find prevalence of udder and teat diseases and their association with udder and teat characteristic, milk yield and milk flow rate in dairy cows. Mastitis (25.5%) was most common disease followed by udder skin diseases (15.0%) and teat diseases (12.6%). P...

Effect of three hygienic conditions (T1washing and disinfection of udder and teats, milker hands, and a sanitary rinse of milking pails using calcium hypochlorite solution with 200 ppm Cl; T2washing of udder and teats, milker hands and milking pails with normal water; and T3without any kind of preparation of udder and teats, milker hands and milking pails) before milking were studied. Fifteen “...

The number of teats is a crucial reproductive trait with significant economic implications on maternal capacity and litter size. Consequently, improving this essential to facilitate genetic selection for increased In study, we performed genome-wide association study (GWAS) the in three-way crossbred commercial Duroc × (Landrace Yorkshire) (DLY) pig population comprising 1518 animals genotyped 5...

Dominance has been suggested as one of the genetic mechanisms explaining heterosis. However, using traditional quantitative genetic methods it is difficult to obtain accurate estimates of dominance effects. With the availability of dense SNP (Single Nucleotide Polymorphism) panels, we now have new opportunities for the detection and use of dominance at individual loci. Thus, the aim of this stu...

Phosphodiesterase type-5 inhibitors (PDE5-Is) have been recommended as first line therapy for erectile dysfunction for patients received nerve-sparing radical prostatectomy for prostate cancer. We examed the efficiency of PDE5-Is and considered the optimal application. Systematic search of PubMed, Embase and the Cochrane Library was performed to identify all the studies. We identified 103 studi...

An experiment was conducted to study whether piglet growth rate is related to mammary gland size. It involved three primiparous sows and four multiparous sows that were fed ad libitum during the lactation period. The piglets received no creep feed. The weight and teat order of the piglets were recorded. The sows were slaughtered after approximately 4 weeks of lactation (25–28 days). The amounts...

MitEv, J. E., Zh. i. GErGovska and tch. M. MitEva, 2012. Effect of teat end hyperkeratosis on milk somatic cell counts in Bulgarian Black-and-White dairy cattle. Bulg. J. Agric. Sci., 18: 451-454 the aim of the study was to investigate the relationship between teat end hyperkeratosis score and somatic cell counts in milk in dairy cattle at different lactations. Five hundred Holstein cattle from...