A5040655697- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Reproductive Biology and Fertility
- Ruminant Nutrition and Digestive Physiology
- Sperm and Testicular Function
- Vector-borne infectious diseases
- Viral Infections and Vectors
- Agricultural and Food Production Studies
- Vector-Borne Animal Diseases
- Agriculture and Farm Safety
- Insect and Pesticide Research
- Toxoplasma gondii Research Studies
- Animal Nutrition and Physiology
- Animal Behavior and Welfare Studies
- Animal health and immunology
- Yersinia bacterium, plague, ectoparasites research
- Natural Products and Biological Research
- Livestock Farming and Management
- Reproductive biology and impacts on aquatic species
- Reproductive System and Pregnancy
- Animal Disease Management and Epidemiology
- Plant and soil sciences
- Marine animal studies overview
- Silkworms and Sericulture Research
Universidad Veracruzana
2013-2025
Texas A&M University
1996-1999
Fort Keogh Livestock and Range Research Laboratory
1997-1999
Arkansas Agricultural Experiment Station
1995-1997
Universidade do Oeste Paulista
1995
Universidade de São Paulo
1995
The objective of this study conducted in tropical Brazil was to characterize some physiological and histological responses heat stress imported Bos taurus, native indicus cattle. Imported Simmental (n = 107), 99), cattle 121) (42 80 mo age) were evaluated. Animals walked 7 km at 37°C 60 65% relative humidity during midday. Rectal temperatures respiration rates taken before after the walk. A .01-cm2 sample cutaneous tissue from lateral cervical region obtained each animal. Slices stained with...
The genus Leptospira includes at least 69 Gram-negative, aerobic spirochetes, of which 25 are pathogenic and associated with a diverse range mammals, including members the order Chiroptera. On American continent, there six confirmed species. Among these, common vampire bat (Desmodus rotundus), ranges widely from northern Mexico to Argentina, has been reported harbor four taxa: borgpetersenii, interrogans, weilii, cf. noguchii. All these species frequently isolated beef dairy cattle,...
Peripubertal beef heifers (n = 57) and postpartum multiparous cows 52) were used to determine the optimal dose of estradiol benzoate (EB) induce synchronize estrus after treatment with intravaginal progesterone inserts (IVP4, EAZI-BREED CIDR). All females received an IVP4 for 7 d (d 0 insertion day) a 25-mg injection PGF2alpha (Lutalyse) on 6. At 24 30 h removal, randomly assigned be injected subcutaneously EB at following doses: 0, .2, .38, or .75 mg .25, .5, 1 mg. Furthermore, seven from...
Brahman cows were used to evaluate dietary fat (3.74% [control] and 5.20% [treated]) effects on blood hormone lipid concentrations, follicular populations, in vitro steroidogenesis. Cows fed ovaries monitored by ultrasound from d 1 of the first estrous cycle (EC) until follicle second EC reached 8 mm, at which time harvested. Follicular fluid (FF) was collected large- medium-sized follicles assayed for progesterone (P4), estradiol-17β (E2), testosterone, cholesterol, triglycerides. The...
Multiparous beef cows (n = 7) were used to evaluate peripartum changes and interactions among body temperature (BT) circulating progesterone (P4), estradiol-17β (E2), triiodothyronine (T3), cortisol, thyroxine (T4), 13,14-dihydro-15-keto-prostaglandin F2α (PGFM) concentrations. Electronic monitors placed under the obliquus abdominis internus muscle of left flank, BT was measured using radiotelemetry every 3 min for 10-s periods from 144 h before 24 after calving. Environmental temperatures...
Prepubertal F1 heifers (n = 246; from crossbred dams bred to either Hereford [H], Limousin [L], or Piedmontese [P] sires) were fed 1.9% (LF) 4.4% (HF) dietary fat 254+/-4 d of age until they reached puberty the breeding season started. Safflower seeds (37% oil with 79% linoleic acid) added source. Blood samples and backfat thickness measurements obtained 60 randomly selected representing sire breeds diets studied. In addition, five H-sired both serially bled at 28-d intervals. Total gain,...
Spring-calving Brahman cows (S) artificially inseminated to Brahman, Angus, or Tuli sires and fall-calving (F) naturally bred were allotted randomly receive 3.74% (LF; n = 9 S 6 F), 5.20% (MF; 8 6.55% dietary fat (HF; S). Diets formulated contain differing fatty acid concentrations be isocaloric isonitrogenous. Cows bled fed twice daily from 2 wk before expected calving date through d 21 after calving. Ultrasonography was performed on 14 From 90 a sterile bull equipped with chin-ball marker...
Effects of prepartum fat supplementation the dam on cold tolerance calves were determined in two studies. In Exp. 1, 22 F1, crossbred heifers gestating F2 received diets containing either 1.7 or 4.7% dietary starting at d 230+/-2d gestation. Safflower seeds (Carthamus tinctorius) 37% oil with 79% linoleic acid supplemental source isocaloric-isonitrogenous diets. Calves separated from their dams birth, fed pooled dairy-cow colostrum, muzzled to prevent sucking, and returned a heated (22...
Effects of feeding pregnant dams supplemental dietary fat during the last 55 d gestation on cold tolerance newborn crossbred calves with (Piedmontese cross, P, n = 15) or without (Hereford H, 16) muscle hypertrophy allele was determined. Primiparous F1 gestating F2 respective breeds were assigned randomly within breed to receive diets containing either 2.2 (Low Fat; LF) 5.1% (High HF). Safflower (Carthamus tinctorius L.) seeds 37% oil 79% linoleic acid source in formulated be...
Active epidemiological surveillance of infectious agents represents a fundamental tool for understanding the transmission dynamics pathogens and establishing public policies that can reduce or limit their expansion. Epidemiological emerging agents, such as recently recognized severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), cause COVID-19, is essential to establish risk between species. Recent studies reveal companion animals are organisms susceptible being infected by this...
A decrease in fertility can have a negative economic impact, both locally and over broader geographical scope, this is especially the case with regard to cattle industry. Therefore, much interest exists evaluating proteins that might be able increase of sperm. Heparin binding (HBPs), specifically associated antigen (FAA) Type-2 tissue inhibitor metalloproteinase (TIMP-2), act favor capacitation acrosome reaction perhaps even modulate immune system’s response toward The objective research was...
Heat production was measured in newborn Angus-, Brahman-, and Tuli-sired calves born to Angus (n = 20) Brahman 26) dams, before (thermoneutral metabolic rate, TMR) after norepinephrine (NE) infusion (peak PMR), assess genotypic effects on nonshivering thermogenesis brown adipose tissue. Calves were fed pooled colostrum, fitted with jugular catheters, placed a temperature-controlled (37°C) water immersion system. production, determined by indirect calorimetry, tympanic temperature...
Abstract Fleas and ticks represent the two main groups of ectoparasites that infest companion animals. In particular, flea Ctenocephalides felis several members Rhipicephalus sanguineus complex are vectors a wide range pathogens on American continent. They competent for genus Rickettsia , which encompass at least 15 pathogenic obligate intracellular bacteria colonize endothelial cells vertebrates. Mexico, 10 species belonging to three have been detected in six from dogs 9 32 states country....
: Localized cutaneous leishmaniasis is a neglected vector-borne disease that has become serious public health problem in the Yucatan Peninsula. Although more than 60% of cases originate from state Quintana Roo, it one least explored areas terms incriminating vectors Leishmania parasite. Additionally, have increased substantially region recent years. For this reason, we and provided primary evidence DNA sand fly species four localities during outbreaks Roo. We also contributed information on...
Embryo transfer using cryopreserved B. indicus embryos results in low pregnancy rates. The viability of is likely a result their freezability relative to from other species, notably taurus. Freezability probably related the quantity lipid droplets embryonic cells. However, mechanism underlying this association unknown. Using multiphoton and transmission electron microscopy, proportion, volume, morphology composition fresh taurus were studied. have more than greater percentage clusters (34%...
This work was carried out in the Tamalín Municipality, located at north of state Veracruz, Mexico, between coordinates 21° 20' latitude and 97° 49' west longitude, a height 140 sea level. The objective this research to know main tree species fodder shrubs that are consumed by cattle, as well identify their different uses. To end, survey previously prepared applied local producers. most relevant results production units evaluated showed consumption these trees improved body condition...