Pregnant ewes were infected in midpregnancy with three isolates of Chlamydia pecorum derived from the feces of healthy lambs from three different farms. Oral infection, alone or together with Fasciola hepatica, did not result in tissue invasion, since all placental and fecal samples were negative for chlamydiae. Intravenous infection resulted in placental infection in 16 of 18 ewes in that chla...

the purpose of this study was to determine the effects of feeding iron-deficient diet during pregnancy and lactation on maternal rats. a total number of 64 rats were divided into 4 groups (pregnant), (non pregnant), (lactating) and (non lactating) with 16 animals in each group. parameters used to evaluate the effects of dietary iron deficiency on the maternal animals were: iron contents of live...

Hair sheep ewes were used to evaluate the influence of various levels of mating stimuli on the duration and timing of estrus and LH concentrations around estrus. Ewes were treated with PGF2alpha (15 mg, im) 10 d apart. At the time of the second PGF2alpha treatment (Day 0) ewes were placed in groups and exposed to different types of mating stimuli. One group of ewes (n = 16) was exposed to an ep...

T WO factors affect lambing rate: (1) frequency of lambing and (2) number of lambs born per pregnancy. Certain individual ewes have given birth to live normal lambs three times within a 12-mo. period. I t is thus apparent that under proper physiological conditions two lambings a year are possible. When the physiological processes involved and their mechanisms of action are more adequately under...

Scrapie, a transmissible spongiform encephalopathy (TSE) or prion disease, is a fatal, neurodegenerative disease in sheep and goats. This disease has been known in Europe for more than 250 years. Susceptibility to scrapie is associated with polymorphisms in the sheep prion protein gene (PrP) gene. In sheep, polymorphism in the PrP gene has been identified at a number of codons, and polymorphism...

In two experiments, 16 Booroola-Assaf and 35 Assaf ewe-lambs were actively immunized at 5 months of age against recombinant ovine placental lactogen (oPL). At 9 months of age, the ewe-lambs were mated for the first time and then introduced into a frequent mating-system. Anti-oPL antibody titers, reproductive performance, maternal serum levels of oPL during pregnancy, lamb birth weight and milk ...

Abstract Fetal microchimerism has been detected in maternal tissues of humans and rodents during after pregnancy. Studies focusing on fetal DNA transfer to domestic animals are limited, especially sheep. ram was observed the circulation pregnancy, but it is not known if this chimerism persists soft parturition. The objectives exploratory study were to: 1) determine male detectable mature ewes p...

The aims of the present study were to diagnose toxoplasmosis in pregnant ewes and women serologically and molecularly, treat naturally infected ewes, and diagnose congenital toxoplasmosis. Blood samples were taken from 30 and 60 pregnant ewes and women, respectively, and used for diagnosis of toxoplasmosis through Latex agglutination test (LAT). Seropositive samples were confirmed by PCR for de...

The main objective of this study was to evaluate the effects of supplementing lactating ewe diets with extruded linseed on the fatty acid (FA) composition of intramuscular and subcutaneous fat depots of suckling lambs. Twenty-four pregnant Churra ewes were divided into two groups based on the milk production, age, body weight and parity, and assigned to one of two treatments. Each ewe of the Co...