<i>Background/Aims:</i> Growth hormone (GH) is necessary for optimal reproductive efficiency and its secretion influenced by sex steroids. This study was designed to determine whether kisspeptin-10 (Kp10) could stimulate GH if gonadal steroids enhance the response Kp10 in cows. <i>Methods Results:</i> Intravenous injection of at 100 or 200 pmol/kg body weight with without treatment estradiol cypionate and/or progesterone increased luteinizing (p < 0.01) plasma...

The objective of this study was to compare reproductive protection in cattle against bovine viral diarrhea virus (BVDV) and herpesvirus 1 (BoHV-1) provided by annual revaccination with multivalent modified-live (MLV) vaccine or combination (CV) containing temperature-sensitive BoHV-1 killed BVDV when MLV vaccines were given pre-breeding nulliparous heifers. Seventy-five beef heifers allocated into treatment groups A (n=30; two doses pre-breeding, vaccine), B CV vaccine) C (n=15; saline lieu...

Artificial insemination is a preferred breeding method for beef heifers as it advances the genetic background, produces predictive and profitable calving season, extends heifer's reproductive life span. As efficiency in key success of cattle production systems, following artificial insemination, are exposed to bull remainder season. Altogether, up 95% might become pregnant their first Heifers that do not at end season represent an irreparable economical loss. Additionally, conceiving late...

Tritrichomonas foetus is the causative agent of bovine trichomoniasis, a sexually transmitted disease in cattle that can result large profit losses for producers. Increasing reports have suggested T. also large-bowel diarrhea cats. To determine if trichomonads recovered from reproductive tract and intestine cats thrive same host, 2 groups virgin Angus heifers were inoculated with foetus. The first group was isolate cultured naturally infected cow, second organisms feces cat. Over an 11-wk...

Infertility is a longstanding limitation in livestock production with important economic impact for the cattle industry. Female reproductive traits are polygenic and lowly heritable nature, thus selection fertility challenging. Beef operations leverage estrous synchronization combination artificial insemination (AI) to breed heifers benefit from an early uniform calving season. A couple of weeks following AI, exposed bulls opportunity become pregnant by natural breeding (NB), but they may...

Packaging technology is evolving, and the objectives of this study were to evaluate instrumental surface color, expert color evaluation, lipid oxidation (TBARS) on beef longissimus lumborum steaks packaged in vacuum-ready packaging (VRF) or polyvinyl chloride (PVC) overwrap packaging. Paired strip loins (Institutional Meat Purchasing Specifications # 180) cut into 2.54-cm-thick assigned randomly one two treatments, VRF PVC. Steaks lighter (p < 0.05) as display period increased, whereas PVC...

The objective of this study was to investigate the effect degree and duration early dietary AA restrictions on subsequent overall pig performance physical sensory characteristics pork. For grower (G) finisher-1 (F1) phases, 3 corn-soybean meal diets were formulated contain 100, 80, or 60% 1998 NRC total Lys recommendations (100G, 80G, 60G, 100F1, 80F1, 60F1, for G F1 respectively). finisher-2 (F2) phase, a common diet satisfy recommendation. Thirty gilts 30 castrated males (2 2 males/pen)...

To determine whether administration of 2 doses a multivalent, modified-live virus vaccine prior to breeding heifers would provide protection against abortion and fetal infection following exposure pregnant cattle persistently infected (PI) with bovine viral diarrhea (BVDV) acute herpesvirus 1 (BHV1) infection.Randomized controlled clinical trial.33 crossbred beef heifers, 3 steers, 6 bulls, 25 calves.20 22 vaccinated 10 11 unvaccinated became were commingled steers PI BVDV type 1a, 1b, or...

Abstract Infertility is a challenging phenomenon in cattle that reduces the sustainability of beef production worldwide. Here, we tested hypothesis gene expression profiles protein-coding genes expressed peripheral white blood cells (PWBCs), and circulating micro RNAs plasma, are associated with female fertility, measured by pregnancy outcome. We drew samples from 17 heifers on day artificial insemination analyzed transcript abundance for 10,496 PWBCs 290 RNAs. The females were later...

To determine whether exercise on alternative terrain affects the development of digital cushion and bony structures bovine foot.20 weaned bull calves.Two-month-old calves were randomly allocated to an or control group. For 4 months, group was maintained in grass paddocks, a 0.8-km lane with mixed dirt, stones (0.32- 0.95-cm pea gravel 5-cm crusher run), grass. Water food for located at opposite ends lane; fed twice daily, which ensured they walked 3.2 km/d. Pedometers applied all measure...

Abstract Infertility remains the most prevalent reason for cattle being removed from production environments. We utilized metabolomic profiling to identify metabolites in blood plasma that may be useful identifying infertile heifers at time of artificial insemination (AI). Prior AI, phenotypic parameters including body condition, weight, and reproductive organ measurements were collected. These determined not effective differentiating between fertile heifers. Analysis resulting profiles...

Reproductive failure is a major contributor to inefficiency within the cow-calf industry. Particularly problematic inability diagnose heifer reproductive issues prior pregnancy diagnosis following their first breeding season. Therefore, we hypothesized that gene expression from peripheral white blood cells at weaning could predict future potential of beef heifers. To investigate this, was measured using RNA-Seq in Angus-Simmental crossbred heifers sampled and retrospectively classified as...

The objective of this study was to determine the possibility replacing soybean meal (SBM) in finisher pig diets completely with hydrolyzed feather (FM). Forty-five gilts and 45 castrated males (57.8 ± 0.8 kg BW; 3 or males/pen) were randomly assigned 5 finisher-1 6 pens per diet. At an average pen BW 81.0 1.4 kg, pigs offered finisher-2 diets. Corn-SBM, positive control (PC) formulated contain 6.1 4.7 g apparent ileal digestible (AID) Lys/kg, respectively. Corn-FM negative (NC) be iso-N PC...

Abstract Primiparous Angus × Simmental dams (n = 22) with an average body weight (BW) of 449 ± 32 kg BW were divided based on two nutritional treatments: control (CTRL) and rumen-protected methionine (RPM). The group received bermudagrass hay, corn gluten, soybean hulls pellets supplementation (base diet); whereas the RPM base diet in addition to 0.07% DM at a fixed rate during last trimester gestation first ~80 d lactation, which calves 17) early weaned. Only male included this study. After...

Protective immunity to avian influenza (AI) virus can be elicited in chickens by ovo or intramuscular vaccination with replication-competent adenovirus (RCA)-free human recombinant serotype 5 (Ad5) encoding AI H5 (AdTW68.H5) H7 (AdCN94.H7) hemagglutinins. We evaluated bivalent AdTW68.H5 and AdCN94.H7 determined that vaccinated developed robust hemagglutination inhibition (HI) antibody levels both strains. Additionally, we immune responses of 1-day-old via spray AdCN94.H7. These birds showed...

Vaccination of young calves against Bovine viral diarrhea virus (BVDV) is desirable in dairy and beef operations to reduce clinical disease prevent spread the among cattle. Although protection from by multivalent, modified-live (MLV) vaccines has been demonstrated, ability MLV viremia shedding possessing passive immunity not known. The purpose this study was compare three different disease, viremia, early weaned maternal that were vaccinated once at 45 days prior challenge with virulent BVDV...

With current meat industry efforts focused on improving environmental influencers, adopting sustainable packaging materials may be an easier transition to addressing the sustainability demands of consumer. growing popularity vacuum-packaged products, study evaluated instrumental surface color fresh ground beef using vacuum films, recycle-ready film (RRF), standard barrier (STB) and enhanced (ENB). Ground packaged ENB was lighter (L*), redder (a*) more vivid (chroma) than all other treatments...

Reproductive failure remains a significant challenge to the beef industry. The omics technologies have provided opportunities improve reproductive efficiency. We used multistaged analysis from blood profiles integrate metabolome (plasma) and transcriptome (peripheral white cells) in heifers. untargeted metabolomics RNA-Seq paired data six AI-pregnant (AI-P) nonpregnant (NP) Angus-Simmental crossbred heifers at artificial insemination (AI). Based on network co-expression analysis, we...