DSpace Community:

influência da condição corporal pré-parto na dinâmica do parto e intervenção manual em fêmeas suínas: avaliação por caliper

2026-01-14T00:00:00Z

Title: influência da condição corporal pré-parto na dinâmica do parto e intervenção manual em fêmeas suínas: avaliação por caliper Abstract: The purpose of this research was to evaluate the impact of pre-partum body condition score, measured using the Caliper, on the occurrence of dystocia and the effects of manual intervention associated with the duration of farrowing. Body condition scores were measured in sows using the Caliper, pre-partum and during the first three weeks of lactation. The variables were subjected to analysis of variance and Tukey's test, with a significance level of 5%. The results showed that touch was associated with increased farrowing duration and a higher incidence of stillbirths, even though sows in this group showed less body condition score loss during lactation, possibly due to post-partum therapeutic support. On the other hand, pre-partum body condition score did not significantly influence farrowing duration, number of live births, and stillbirths. Greater body condition score loss was observed among fat sows, suggesting greater mobilization of energy reserves throughout lactation. Therefore, the management of sows should prioritize good body condition at farrowing, reduction of unnecessary obstetric interventions, and efficient therapeutic support for recovery, prioritizing the well-being of the sow.

Efeito do estresse por calor no desempenho reprodutivo de matrizes suínas nos trópicos e avaliação do limiar de ITU

2025-12-29T00:00:00Z

Title: Efeito do estresse por calor no desempenho reprodutivo de matrizes suínas nos trópicos e avaliação do limiar de ITU Abstract: First, the study aimed to model and estimate the impact of the maximum temperature–humidity index (THImax) on the number of stillbirths in sows and to calculate the stress–comfort ratio (S/C). A total of 36,880 farrowings from sows in a commercial farm in Brazil were analyzed. Females were grouped according to parity as gilts, primiparous sows, sows with 2–5 parities, and sows with ≥6 parities. THImax on the day of farrowing was classified as ≤74 (thermal comfort), 75–78 (mild stress), 79–82 (moderate stress), and >82 (severe stress). The effect of THImax on the daily number of stillbirths was estimated using quasi-Poisson regression. The mean number of stillbirths per farrowing and per THImax category was analyzed by ANOVA, and the S/C ratio was subsequently calculated according to THImax categories. Out of a total of 1,826 days, 14.95% were classified as thermal comfort days. Multiparous sows (≥2 parities) showed a higher number of daily stillbirths under THImax >82, whereas primiparous sows showed higher values under THI <74. According to the S/C ratio (severe/comfort), increases in stillbirths of 20% in gilts, 7% in primiparous sows, 14% in sows with 2–5 parities, and 19% in sows with ≥6 parities were observed. The quasi-Poisson model indicated an increase in daily stillbirths in multiparous sows (≥2 parities) under THImax >82, and an S/C ratio greater than 1 across all parity groups, indicating an increased mean number of stillbirths per farrowing, particularly under severe heat stress conditions. In the second study, the objective was to model and estimate the effects of air temperature (Ta) and relative humidity (RH) on respiratory rate (RR), rectal temperature (RT), and surface temperature (ST) of sows, and to assess whether the current THI threshold underestimates or overestimates heat stress under tropical production conditions. A total of 98 sows from a commercial farm in Brazil were evaluated and grouped according to parity as gilts, primiparous sows, sows with 2–6 parities, and sows with 7–11 parities. The effects of environmental variables on thermophysiological responses were estimated using quasi-Poisson regression (RR) and Gaussian models (RT and ST). Increases in Ta and RH significantly affected RR, RT, and ST in sows with 2–6 parities, whereas in gilts, only ST was affected. When estimating RR, this variable was identified as the first physiological response to increase with rising Ta and RH in primiparous and multiparous sows (≥2 parities). In these groups, RR exceeded the physiological threshold (32 breaths·min⁻¹) while THI values were still below 74. In conclusion, heat stress affects sows differently according to parity, and the current THI threshold (74) underestimates the impact of heat stress on sows raised under tropical conditions.

Uso da técnica de Haste Intramedular Bloqueada (HIB) em fratura diafisária femoral em tamanduá bandeira (mymercophaga tridactyla): relato de caso

2025-12-11T00:00:00Z

Title: Uso da técnica de Haste Intramedular Bloqueada (HIB) em fratura diafisária femoral em tamanduá bandeira (mymercophaga tridactyla): relato de caso

Interação de aditivos alimentares em dietas ricas em amido à base de sorgo para cordeiras

2026-02-06T00:00:00Z

Title: Interação de aditivos alimentares em dietas ricas em amido à base de sorgo para cordeiras Abstract: The objective of this study was to evaluate the combined effects of live yeast (Saccharomyces cerevisiae), condensed tannin, and an amylolytic enzyme on feed intake, diet digestibility, nitrogen balance, and blood parameters of ewe lambs fed high-starch sorghum-based diets. Five crossbred ewe lambs (Dorper × Santa Inês), with an average age of 5.6 ± 1.4 months and an initial body weight of 28.8 ± 3.7 kg, were housed in individual metabolic cages for a 75-day experimental period. The experimental diets were formulated with a 20:80 forage-to concentrate ratio, and animals were fed twice daily at 08:00 and 16:00 h. The treatments consisted of: i) diet without additives (control); ii) amylolytic enzyme + tannin (TE); iii) amylolytic enzyme + live yeast (EY); iv) live yeast + tannin (TY); and v) live yeast + tannin + amylolytic enzyme (TYE). During a five-day collection period, nutrient intake and digestibility, as well as protein, enzymatic, and energy-related blood metabolites, were evaluated. Data were analyzed using PROC MIXED of SAS, considering differences significant at P ≤ 0.05 and trends at P ≤ 0.10. The experiment was conducted in a 5 × 5 Latin square design. The inclusion of additives increased plasma glucose, dry matter (DM) intake, and the digestibility of DM and starch. The TE, TY, and TYE treatments showed higher crude protein (CP) intake compared to the EY treatment. The digestibility of DM, CP, and starch was reduced in the TY and TYE treatments, which also showed higher fecal output (as-fed basis) and higher fecal dry matter content. The EY treatment reduced nitrogen balance and increased serum LDL concentrations, whereas the TE treatment resulted in lower fecal nitrogen excretion and lower triglyceride concentrations. A tendency toward increased serum urea and creatinine concentrations was observed in the EY and TE treatments. The TYE treatment promoted higher serum alkaline phosphatase activity. No effects of the additives were observed on water intake, fecal starch content, urinary volume and density, fecal dry matter output, fecal score, or urinary nitrogen excretion. A linear effect was observed in the glycemic curve, with the highest value recorded at 17:00 h (71.03 mg dL⁻¹). It is concluded that different combinations of live yeast, condensed tannin, and amylolytic enzyme in high-concentrate diets for ewe lambs increase DM intake and improve DM and starch digestibility without compromising water balance or the evaluated energy, enzymatic, and protein metabolic parameters.