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Influência da idade e do sexo no perfil bioquímico sérico de frangos de corte.

2026-09-12T06:28:22Z

Title: Influência da idade e do sexo no perfil bioquímico sérico de frangos de corte. Abstract: The objective of this study was to evaluate the influence of age and sex on the serum biochemical profile of broileres in an industrial production. Blood samples were collected from 100 broilers of the Ross genetic through unar vein, 50 females and 50 males, grouped according to age at zero, 7, 14, 23 and 28 days. The serum concentrations of total proteins, albumin, globulins, albumin/globulin, uric acid, urea, creatinine, cholesterol, triglycerides, HDL, LDL, VLDL, calcium, phosphorus, and Ca/P ratios were determined, magnesium, ALT, AST, GGT and ALP. The values between sex at the same age and the male and female group (mixed) at different ages were compared. In general, age influenced all parameters and sex in only eight of the twenty parameters evaluated.

Eficiência de pastejo em pastagens diferidas de capim-cayana com estruturas contrastantes

2026-09-10T06:21:21Z

Title: Eficiência de pastejo em pastagens diferidas de capim-cayana com estruturas contrastantes Abstract: The seasonality of forage production imposes challenges on maintaining animal productivity in pasture-based production systems. In this context, pasture deferment emerges as a management strategy capable of ensuring forage supply during the off-season, promoting biomass accumulation at the end of summer for use in winter. However, the structure of the pasture at the end of the deferment period directly influences grazing efficiency, that is, the utilization of deferred forage. Thus, the present study was conducted to quantify grazing efficiency in deferred pastures with Cayman grass (Brachiaria spp. cv. Cayana) with different forage masses. The experiment was carried out from 02/17/2025 to 09/17/2025, at the Capim Branco Experimental Farm of the Faculty of Veterinary Medicine and Animal Science at the Federal University of Uberlândia, in Uberlândia, MG. Grazing efficiency was evaluated based on the formula: GE (%) = 100% - P (%), in which GE refers to grazing efficiency is the loss of forage. The pasture with High MF showed a lower grazing efficiency value of 44%, while the pasture with Medium MF had a higher value of 53%. The pasture with Low MF, in turn, presented an intermediate grazing efficiency value of 47%; however, grazing efficiency was directly related to the structure of the forage, with the treatment containing a higher proportion of live leaves allowing for better forage utilization by the animals, resulting in higher grazing efficiency.

Avaliação de indicadores de higiene de queijos Minas Frescal não inspecionados comercializados em feiras livres do município de Uberlandia, MG

2026-09-05T06:21:04Z

Title: Avaliação de indicadores de higiene de queijos Minas Frescal não inspecionados comercializados em feiras livres do município de Uberlandia, MG Abstract: Minas Frescal cheese is one of the most widely consumed dairy products in Brazil. Due to its highly perishable nature, resulting from its high moisture content and the absence of a ripening stage, this product is particularly susceptible to the growth of spoilage and pathogenic microorganisms, especially when produced and marketed without sanitary inspection. In this context, inadequate hygienic and sanitary conditions during production, storage, and refrigeration may compromise its microbiological quality and pose a risk to consumers. Therefore, this study aimed to evaluate the microbiological quality of uninspected Minas Frescal cheese commercialized at open-air markets in Uberlândia, Minas Gerais, Brazil. A total of 25 cheese samples were analyzed for aerobic mesophilic bacteria (AMB), total coliforms at 35 °C (C35), and thermotolerant coliforms at 45 °C (C45). The results were compared with data obtained from a previous study conducted in the same municipality between 2018 and 2020. Compared with the previous period, a significant reduction (P < 0.05) was observed in C45 counts, with the mean decreasing from 4.35 to 1.88 Log₁₀ MPN/g. However, AMB counts averaged 6.48 Log₁₀ CFU/g, with no significant difference compared with the previous study (P > 0.05). Additionally, 18 (72%) samples showed C35 counts above 3.04 Log₁₀ MPN/g, suggesting unsatisfactory hygienic and sanitary conditions during production and commercialization. Considerable variability in microbiological quality was also observed among cheeses sold by different vendors, indicating a lack of standardization in production and commercialization practices. Furthermore, samples collected on Mondays exhibited mean AMB counts 1.44 Log₁₀ CFU/g higher than those collected on Thursdays (P < 0.05). In conclusion, despite the improvement observed in C45 counts, the evaluated cheeses still presented unsatisfactory microbiological quality, characterized by high AMB and C35 counts and marked variability among the analyzed samples. These findings highlight the need to strengthen good manufacturing practices, microbiological monitoring, and the integration of producers into official inspection services to ensure consumer safety.

Isolamento microbiológico e confirmação molecular de Salmonella spp. em queijos minas frescal não inspecionados comercializados em feiras livres no município de Uberlândia (MG)

2026-09-05T06:21:04Z

Title: Isolamento microbiológico e confirmação molecular de Salmonella spp. em queijos minas frescal não inspecionados comercializados em feiras livres no município de Uberlândia (MG) Abstract: Minas Frescal Cheese (MFC) is one of the most widely consumed dairy products in Brazil, owing to its high nutritional value and broad consumer acceptance. However, due to its high moisture content and lack of ripening, it is highly susceptible to microbiological contamination when produced and sold without sanitary inspection or the adoption of Good Agricultural and Manufacturing Practices. Under such conditions, its consumption can pose a public health risk, as dairy products are frequently implicated in foodborne disease outbreaks, with Salmonella spp. standing out as a primary etiological agent. Thus, this study aimed to evaluate the occurrence of Salmonella spp. in uninspected Minas Frescal Cheeses sold at open-air markets in the municipality of Uberlândia, Minas Gerais. Samples from 25 cheeses, collected between June and July 2026, were analyzed. Salmonella spp. detection was performed according to ISO 6579-1, followed by molecular confirmation of isolates via polymerase chain reaction (PCR) targeting the ompC and invA genes. The frequency of Salmonella spp. positivity was compared against current regulations (RDC nº 724/2022 and IN nº 161/2022) and across collection days using Fisher's exact test, with a significance level of 5% (p<0,05). Of the 25 samples evaluated, 13 (52%) tested positive for Salmonella spp. Twenty isolates were obtained: two tested positive only for the ompC gene, six exclusively for invA, and twelve tested positive for both genes. A significant association was observed between the day of sale and the occurrence of Salmonella spp. (p = 0,0414), with a higher frequency in samples collected on Mondays (68,75%) compared to those collected on Thursdays (22,22%). Furthermore, cheeses sold on Mondays were 7,70 times more likely to test positive for Salmonella spp. (OR = 7,70; 95% CI: 1,129–42,83). The results demonstrate a high prevalence of Salmonella spp. in uninspected cheeses, indicating a public health risk and the need to strengthen sanitary control measures.