The aim of this study was to determine the possible relationship between the presence of lesions called “White Spotted Kidney” (WSK) and the seroprevalence of Leptospira spp in cattle slaughtered in the Manta slaughterhouse, Manabí province, Ecuador. Blood samples were taken from 320 cattle to detect antibodies against Leptospira spp using the microagglutination technique. Likewise, a macroscopic revision of the kidneys was made, and samples were taken for histopathological analysis. The seroprevalence of Leptospira spp was 50.9% and the frequency of kidney injury was 18.13%. The presence of the eight serovars evaluated was found, with the serovars Pomona, Icterohaemorragiae and Bratislava being the most frequent. Animals serologically positive for Leptospira are 40.56 more likely to have specific lesions associated with the disease at the time of slaughter (p<0.00001; OR = 40.56...

The aim of this study was to determine the possible relationship between the presence of lesions called “White Spotted Kidney” (WSK) and the seroprevalence of Leptospira spp in cattle slaughtered in the Manta slaughterhouse, Manabí province, Ecuador. Blood samples were taken from 320 cattle to detect antibodies against Leptospira spp using the microagglutination technique. Likewise, a macroscopic revision of the kidneys was made, and samples were taken for histopathological analysis. The seroprevalence of Leptospira spp was 50.9% and the frequency of kidney injury was 18.13%. The presence of the eight serovars evaluated was found, with the serovars Pomona, Icterohaemorragiae and Bratislava being the most frequent. Animals serologically positive for Leptospira are 40.56 more likely to have specific lesions associated with the disease at the time of slaughter (p<0.00001; OR = 40.56...

The aim of this study was to evaluate the efficiency of artificial insemination (AI) services in Holstein x Brahman cows under a heat induction programme. Three experiments were carried out. In Exp. 1, a retrospective analysis of the efficiency of AI insemination of 41 000 cows treated with the combination of progesterone and oestradiol benzoate or equine chorionic gonadotropin (eCG) was carried out. In Exp. 2 it was evaluated 863 cows inseminated after heat induced with progesterone and oestradiol benzoate to know the physiological events that occur before and after service in herds with a high incidence of anoestrus. Gynaecological examinations and determination of progesterone in milk were performed. The purpose of Exp. 3 was to improve the effectiveness of AI services for cows in postpartum anoestrus treated with progesterone and oestradiol benzoate combined with a technique to iden...