The objectives of this study were to describe the incidence postpartum disease and evaluate association with serum cholesterol concentrations during first 3 weeks after calving in grazing dairy cows. between non-esterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), calcium diseases was also evaluated. A total 307 Holstein cows from 6 commercial herds Osorno, Chile, monitored until 21 days milk. Cases retained placenta, clinical hypocalcemia mastitis recorded by farmer using established...

ABSTRACT: Worldwide, milk analysis is an satisfactory measurement of quality on dairy farms. Milk composition the base for payment systems, so knowledge its characteristics at different periods essential modern producer. The aim study was to evaluate effects year, season, stage lactation, and lactation number variations in yield Holstein cows (n=148,604). estimated by multiple regression 25,50L/cow/day. Winter season with highest protein lactose content. fat fall, late also primiparous cows....

This study was undertaken to evaluate the influence of daily pasture allowance and concentrate supplementation on dairy cows during autumn.The lasted 56 days using 30 Holstein Friesian cows.The treatments resulted from a combination two allowances (L = low allowance, 20 H high kg DM cow -1 day , measured at ground level) three levels (0, 3 or 6 ).All received 4.5 grass silage.The increase in had no effect milk production (P > 0.05), but increased protein concentration (from 3.02% 3.21%) <...

Two experiments were carried out to 1) compare pH values of rumen fluid samples (RF) obtained from dairy cows by dorsomedial rumenocentesis, a probe and permanent cannula 2) evaluate the effectiveness rumenocentesis its effects on health performance Holstein-Frisian grazing cows.Experiment 1: Four lactating with used.RF at 8:30, 13:30 17:30 hours, using (from caudoventral, caudodorsal, ventral dorsal sacs).A RF sample was also hours rumenocentesis.pH caudoventral sac similar correlated (r =...

RESUMENObjetivo. El objetivo del estudio fue determinar la asociación, sensibilidad (Se) y especificidad (Es) de las enzimas glutamato deshidrogenasa (GDH, EC: 1.4.1.3), aspartato aminotransferasa (AST, 2.6.1.1) g-glutamil transpeptidasa (GGT, 2.3.2.2) como indicadores daño hepático en perfiles bioquímicos sanguíneos vacas lecheras. Materiales métodos. Se analizaron los valores actividad plasmática GDH, AST GGT, obtenidos 1566 correspondientes a 112 realizados rebaños lecheros. determinó...

There are several causes of carcass condemnation in poultry processing plants, including dorsal cranial myopathy (DCM), which the anterior latissimus dorsi (ALD) muscle is affected. DCM etiology has not been elucidated yet, but this lesion impairs visual quality carcasses and economic losses due to downgrading condemnation. The effects on systemic health broilers still unknown. In context, objective study was evaluate injury indicators presenting or DCM. following parameters were evaluated:...

The aim of this study was to evaluate the effect herbage allowance (HA) and type silage supplemented (TS) on milk yield, dry matter intake (DMI) metabolism dairy cows in early lactation. Thirty-six Holstein-Friesian were allocated four treatments derived from an arrangement two HA (LHA = 17 or HHA 25 kg DM/cow/day) TS (grass (GS) maize (MS)). Herbage had no DMI yield. Rumen pH NH3 -N concentration not affected by HA. efficiency microbial protein synthesis rumen (microbial (MP)) with 21.5...

Here we describe an outbreak of chorioptic mange in cattle, 56 years after its first identification Brazil. Between the months June and July 2011, dermatitis characterized by alopecia crusted thickened skin at insertion tail ischiorectal fossa was recognized 40 (35.7%) out 112 Holstein cows on a farm northeastern mesoregion state Rio Grande do Sul, After diagnosing caused Chorioptes bovis, were weighed treated with 0.5% ivermectin, as pour-on single dose, separated into two groups: early...

Resumen es: El experimento se desarrollo con el objetivo de determinar y comparar efecto la suplementacion concentrados a base fibra o almidon, sobre el...

ABSTRACT: This study vised to detect possible changes in chemical and cellular composition of cow’s milk at different milking sessions test if proportional or composite sampling can be used instead separate analysis. Two experiments were conducted: one cows milked thrice daily the other twice daily. In both experiments, three samples collected from each cow session order determine milking; have a sample, i.e., single sample same aliquots session; volume yielded. Fat content fat protein ratio...

The aim of this study was to describe and compare the frequency mineral imbalances in groups prepartum lactating dairy cows south Chile.The blood concentrations calcium, inorganic phosphate, magnesium, sodium, potassium, copper zinc, calcium:inorganic phosphate ratio activity enzyme glutathione peroxidase, which indicates selenium status, were analysed.The values obtained from 3,216 metabolic profiles performed Chilean herds between 1986 2011.Each profile consisted a group 5 or more...

This study was undertaken to evaluate the influence of daily pasture allowance and concentrate type on ruminal pH, ammonia nitrogen (N-NH 3 ) volatile fatty acid (VFA) concentrations in rumen autumn-calving dairy cows early lactation.Three Chilean Black Friesian fitted with cannulas where used.The four dietary treatments were a combination two allowances above ground level (moderate, 25.5 high, 38.5 kg dry matter/cow/day) types offered at 5 kg/cow/day, corn-based (A) sugar beet pulpbased...

The present study evaluated the effect of variation in amount total dietary fiber (TDF) sow diets, provided from 74 to 114 days gestation, on digestibility nutrients and energy during as well productivity metabolism gestation lactation. Thirty-three sows were used a randomized experimental design. amounts TDF three treatment diets 156, 223, 282 g kg−1. daily intake was similar for all entire period differing only volume ration consumed, which 2.1, 2.2, 2.4 kg day−1 (days 90) 2.5, 2.6, 2.8 91...

ABSTRACT This study aimed to determine the impact of different post-partum disorders on milk yield and composition. One hundred fifteen Holstein cows from a commercial dairy farm located in state Rio Grande do Sul southern Brazil were monitored up 62 days post-partum. During this period, body condition score evaluation animal clinical examination conducted. Percentages fat, protein, lactose, as well somatic cells score, determined samples. The AST activity concentrations NEFA, calcium, BHBA,...

The aim of this study was to propose reference intervals (RI) for blood markers mineral balance in prepartum and lactating groups dairy cows the South Chile.The concentrations values calcium, inorganic phosphate, magnesium, sodium, potassium, copper zinc ratio calcium/inorganic phosphate were analysed.The obtained from 1,414 metabolic profiles performed between 2003 2011 herds.Each profile consisted a group 5 or more cows, according their physiological condition they classified 2 categories:...

Canine venereal transmissible tumor (CTVT) is a round cell benign neoplasia that affects the external genital mucous which transmitted during coitus with infected dogs.The normal canine behaviour such as smelling and sucking allow tumoral cells to implant into extragenital zones subsequent metastases formation.This report described dog multiple skin nodules localised in thoracolumbar area eyes.The were ulcered alopecic purulent fluid around them.A granulomatous mass focal necrosis was also...

RESUMENObjetivo. Dos experimentos se realizaron para determinar el estatus de selenio en equinos Criollo-Chileno a pastoreo y, evaluar la respuesta suplementación con Na2SeO3. Materiales y métodos. Exp.1A caballos pertenecientes 10 criaderos del sur Chile les determinó actividad sanguínea glutatión peroxidasa (GPx, EC.1.11.1.9) (AcGPx). Los animales pertenecieron 3 grupos, otoño (PO, n=40), suplementados avena (PO+A, n=47), primavera (PP, n=41). Exp2Se utilizaron carencia selenio,...

The aim of this study was to evaluate the influence magnesium oxide (MgO) supplementation at different times and doses on ruminal pH (Mg) metabolic balance in lactating dairy cows grazing a permanent pasture.Four ruminal-fistulated Friesians were used.Animals arranged 4x3 design, with 3-experimental periods each experiment.After twenty days pre-experimental period, measurement lasted 1 day an inter-experimental time 3 days.MgO given as oral drench after milking.Experiment-1: C = control, MS...