Introduction: In the Czech Republic, there is a deficiency of selenium in sheep due to its low level occurrence soil, thus fodder. Selenium these animals can manifest number diseases. Therefore, should be supplemented with preparations containing vitamin E, because Se closely related which plays an important role immune system. Aim: The aim study was assess status selected breeds Republic and d...

Background: Cystic echinococcosis (CE), known as hydatid cyst, is a zoonotic parasitic infection caused by the larval stage of Echinococcus granulosus (E. granulosus). Antigen B, the major component of hydatid cyst fluid, is encoded by members of a multigene family. The present study aimed to evaluate the genetic diversity of the gene encoding antigen B8/1 (EgAgB8/1) among the main intermediate...

Experimentally inoculated sheep and cattle were used as models of natural ruminant infection to investigate the pattern of Escherichia coli O157:H7 shedding and gastrointestinal tract (GIT) location. Eighteen forage-fed cattle were orally inoculated with E. coli O157:H7, and fecal samples were cultured for the bacteria. Three distinct patterns of shedding were observed: 1 month, 1 week, and 2 m...

Shiga toxin-producing Escherichia coli (STEC) is an important cause of food-borne illness in humans. Ruminants appear to be more frequently colonized by STEC than are other animals, but the reason(s) for this is unknown. We compared the frequency, magnitude, duration, and transmissibility of colonization of sheep by E. coli O157:H7 to that by other pathotypes of E. coli. Young adult sheep were ...

The presence of sorbitol-negative Escherichia coli O157 was investigated in healthy Awassi sheep faeces from 175 randomly selected animals in Burdur province of Turkey. Out of 175 animals, 16 (9.1%) were faecal shedding of sorbitol-negative E. coli O157. Out of the 15 flocks included in the study, 7 (47%) had at least one sheep positive for sorbitol-negative E. coli O157. The isolation rate of ...

The aim of this work was to characterize the strain of protoscoleces of E. granulosus of cattle origin using the in vitro vesicular development. The in vitro development of these samples was compared to samples of sheep origin determined previously by genetic analyses as common sheep strain (G1). There were similarities between sheep and cattle samples not only in the time of microcysts formati...

Binucleate cells of sheep and goat fetal placentae comprise about one-fifth of the trophectodermal layer at the feto-maternal interface. When isolated and incubated in vitro they produce the steroids that are synthesized by the placenta in vivo (progesterone in sheep, 5 beta-pregnane-3 alpha,20 alpha diol in goats). This study demonstrates that progesterone synthesis in binucleate cell preparat...

Two bighorn sheep (Ovis canadensis) in New Mexico (USA) were found to be naturally infected with Elaeophora schneideri. An adult ram examined in 1997 in the Fra Cristobal Mountains had 26 nematodes in the carotid and iliac arteries, and microfilariae were present in the skin, nasal mucosa, brain, and lungs. This ram was markedly debilitated prior to euthanasia and extensive crusty, scabby lesio...

The melanocortin 1 receptor (MC1R) gene has been described as responsible for the black color in some breeds of sheep, but little is known about its function in many colored breeds, particularly those with a wide range of pigmentation phenotypes. The Brazilian Creole is a local breed of sheep from southern Brazil that has a wide variety of wool colors. We examined the MC1R gene (Extension locus...

BACKGROUND Antigen B (AgB) is frequently used for immuno-diagnosis of human cystic echinococcosis (CE). Echinococcus granulosus AgBs show a high degree of genetic variability in different hosts or in different CE endemic areas. The present study aimed to evaluate the genetic polymorphisms of encoding antigen B2 gene (AgB2) among different Iranian isolates of E. granulosus. METHODS A total of ...