A5025422327- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Animal Virus Infections Studies
- Animal Disease Management and Epidemiology
- Virus-based gene therapy research
- Influenza Virus Research Studies
- Reproductive Biology and Fertility
- Viral gastroenteritis research and epidemiology
- Sperm and Testicular Function
- Animal Nutrition and Physiology
- Herpesvirus Infections and Treatments
- Effects of Environmental Stressors on Livestock
- Toxoplasma gondii Research Studies
- Microbial infections and disease research
- Genetic Mapping and Diversity in Plants and Animals
- Respiratory viral infections research
- Animal Behavior and Welfare Studies
- Veterinary Oncology Research
- Animal Genetics and Reproduction
- Vector-Borne Animal Diseases
- Parasitic Infections and Diagnostics
- Animal Nutrition and Health
- Immune Response and Inflammation
- Oral and Maxillofacial Pathology
- Meat and Animal Product Quality
Universidade de Passo Fundo
2013-2024
Agricultural Research Service
2010-2024
United States Department of Agriculture
2009-2024
National Animal Disease Center
2009-2024
Universidade do Estado de Santa Catarina
2021
Instituto Federal Catarinense
2021
Brazilian Agricultural Research Corporation
2004-2021
Fundo Brasil
2020
Fundação de Estudo e Pesquisa em Medicina Veterinária e Zootecnia
2018
Universidade Federal de Santa Maria
2013
Summary With the objective of mapping quantitative trait loci (QTLs) for performance and carcass traits, an F 2 chicken population was developed by crossing broiler layer lines. A total 2063 chicks in 21 full‐sib families were reared as broilers slaughtered at 42 days age. Seventeen traits measured. Parental (F 0 ) 1 individuals genotyped with 80 microsatellites from chromosome to select informative markers. Thirty‐three markers used selective genotyping extreme phenotypes body weight age...
A novel A/H1N1 was identified in the human population North America April 2009. The gene constellation of virus a combination from swine influenza viruses (SIV) American and Eurasian lineages that had never before been or other species.
Swine influenza is a highly contagious viral infection in pigs that significantly impacts the pork industry due to weight loss and secondary infections. There also potential of significant threat public health, as was seen 2009 when pandemic H1N1 virus strain emerged from reassortment events among avian, swine, human viruses within pigs. As classic strains now circulate an effective vaccine may be best strategy protect health. Current inactivated-virus vaccines available for swine only...
Objectives were to characterize changes in concentrations of LH, FSH, and estradiol-17beta (estradiol) blood populations ovarian follicles prepubertal cattle during waves follicular development evaluate interactions between day after aspiration month prepuberty for these variables. During each (month prepuberty), aspirated induce synchronous emergence a wave (day aspiration). Characteristics hormones evaluated the growth. Multiple regression was used estimate hormonal variables prepuberty....
The influence of episodic LH pulses before and subsequent to ovulation on size function the corpus luteum (CL) in cattle was examined. Treatments were 1) control; 2) LHRH antagonist starting 2 days preovulatory surge (Antagonist [Ant] −2); 3) at initiation (Ant 0); 4) after 2). with an continued until 7 surge. Diameter CL concentrations progesterone monitored during luteal phase that ensued treatment. Maximum average diameters 9.5, 17.5, 21.6, 28.8 mm for females from Ant −2, 0, 2, control...
An F2 experimental population, developed from a broiler layer cross, was used in genome scan of QTL for percentage carcass, carcass parts, shank and head. Up to 649 chickens four paternal half-sib families were genotyped with 128 genetic markers covering 22 linkage groups. Total map length 2630 cM, approximately 63% the genome. interval mapping using regression methods applied line-cross models. Under model, 12 genome-wide significant 17 suggestive linkages percentages head mapped 13 groups...
Summary Major objectives of the poultry industry are to increase meat production and reduce carcass fatness, mainly abdominal fat. Information on growth performance composition important for selection leaner chickens. To enhance our understanding genetic architecture underlying chemical chicken carcasses, an F 2 population developed from a broiler × layer cross was used map quantitative trait loci (QTL) affecting protein, fat, water ash contents in carcasses. Two models were applied QTL...
The emergence of the pandemic 2009 H1N1 influenza A virus in humans and subsequent discovery that it was swine lineages raised concern over safety pork. Pigs experimentally infected with developed respiratory disease; however, there no evidence for systemic disease to suggest pork from pigs would contain infectious virus. These findings support WHO recommendation harvested is safe consume when following standard meat hygiene practices.
Pseudorabies virus (PRV) is the cause of Aujeszky’s disease, a disease that significant economically for swine industry worldwide. A real-time polymerase chain reaction (PCR) assay based on gB and gE genes was used to identify PRV nucleic acid in diagnostic samples. Using isolation (VI) as gold standard, PCR performed well variety matrices. Testing conducted 1,027 nasal swabs with following findings: sensitivity: 94.6% (95% confidence interval [CI]: 92.3–96.4%), specificity: 71.0% CI:...
Fifteen bovine herpesvirus-1 (BHV-1)-negative calves were vaccinated intramuscularly with 10(7.4) plaque-forming units of a double-deletion BHV-1 mutant (IBRV(NG)dltkdlgIII), and 6 remained as nonvaccinated controls. Thirty days after vaccination, the animals challenged by nasal instillation 10(8.2) CCID50 virulent strain (Cooper). The protected against wildtype virus challenge demonstrated clinical evaluation. Most vaccinates developed only mild rhinitis (lasting an average 6.5 days) almost...
The intensification of the use artificial insemination in swine industry has increased interest to develop proper conditions store semen better for longer periods time without affecting its fertility. Trolox is a vitamin E analog with antioxidant property prevent oxidative stress. Therefore, objective this study was evaluate capacity on boar during storage period (86 h) at 15°C. For that, samples from 5 different boars were collected and diluted Long-Term (LT) extender addition concentration...
Introduction: Cryptorchidism is a hereditary anomaly characterized by the incomplete descent of one or both testicles to scrotum. One challenges this that retained testicle maintains its endocrine function. As consequence, cryptorchid animals produce hormone-tainted meat in comparison castrated and are likely be more aggressive. can lead reduced animal welfare outcomes cause economic losses. Identifying genetic markers for cryptorchidism an essential step toward mitigating these negative may...
The objective of this study was to evaluate morphological characteristics and testicular function boars with different endogenous concentrations FSH. Boars were selected at 6 mo age on the basis mean FSH in plasma collected 4, 5, age. classified within half-sibling families based whether they had high (HiFSH, > 500 ng/ml, n = 9) or low (LoFSH, < 7). At 14.5 mo, testes collected, fixed, sectioned 1 μm, evaluated for characteristics. LoFSH larger (p 0.01) epididymal weights than HiFSH, greater...
Two field trials were conducted in Brazil to evaluate LHRH immunocastration of Bos indicus bulls (d 0 = 2 yr age). In Study I, 72 assigned randomly one three treatment groups: LHRH0-immunized, castrated, and intact. Immunized animals (n 25) received a primary two booster injections ovalbumin-LHRH-7 thioredoxin-LHRH-7 fusion proteins on d 0, 141, 287. Twenty-three surgically castrated 24 served as intact controls. All slaughtered 385, at approximately 3 age. II, 216 the same treatments I;...
Summary Infection of germ‐free isolator piglets with swine influenza (S‐ FLU ) that generates ds RNA during replication causes elevation immunoglobulins in serum and bronchoalveolar lavage, a very weak response to trinitrophenyl conjugates but an immune S‐ . The increased immunoglobulin levels result mainly from the polyclonal activation B cells infection, model antigen exposure may contribute. 10‐fold increase local IgG accompanies decrease transcription IgG3 tracheal–bronchial lymph nodes...
Pseudorabies virus (PRV) is a neurotropic alphaherpesvirus that produces fatal encephalitis in newborn pigs, respiratory disorders fattening and reproductive failure sows. Following primary infection of the tract, PRV can develop into systemic with dispersion via lymphatic system involves mononuclear cells tracheobronchial lymph nodes (TBLNs). The objectives present study were to evaluate pathogenesis determine early immune cytokine profiles TBLNs following experimental feral swine isolate...