Effects of protein-energetic supplementation frequency on growth performance and nutritional characteristics of grazing beef cattle     

Renata Pereira da Silva-Marques  Joanis Tilemahos Zervoudakis  Nelcino Francisco De Paula  Luciana Keiko Hatamoto-Zervoudakis  Pedro Ivo José Lopes da Rosa e Silva  Núbia Bezerra do Nascimento Matos 《Tropical animal health and production》2018,50(3):495-501

Two experiments were conducted to evaluate reduced supplementation frequencies for grazing beef cattle in rainy season. In experiment 1, evaluating the nutritional parameters, four rumen-cannulated Nellore bulls (BW = 410 kg) were used. In experiment 2, evaluating animal performance, 48 Nellore bulls (BW = 358 kg) were used. The treatments were as follows: mineral supplement (MS) alone and MS plus protein-energy supplement provided 3×, 5× and 7×/week. Supplementation frequency did not affect (P > 0.05) intake and digestibility. Average daily gain was greater (P < 0.001) to supplementation compared with MS. The supplementation 5×/week resulted in greater weight gain per hectare (9.24) and higher economic returns during the study period (1.64%) compared to other supplementations. Supplementation 5×/week increased animal performance and positively influenced economic returns.  相似文献   

Feeding behavior of feedlot lambs fed diets containing levels of cassava wastewater     

Paula de Aguiar Silva  Gleidson Giordano Pinto de Carvalho  Aureliano José Vieira Pires  Stefanie Alvarenga Santos  Douglas dos Santos Pina  Robério Rodrigues Silva  Carlindo Santos Rodrigues  Luis Henrique Almeida de Matos  Carlos Emanuel Eiras  Daiane Novais-Eiras  Wilson Souza Nunes 《Tropical animal health and production》2018,50(4):721-726

In this study, we evaluated the effects of including cassava wastewater in the diet on the feeding behavior of feedlot lambs in 35 male uncastrated Santa Inês × Dorper crossbred lambs at an approximate age of 3 months, with an average live weight of 20.0?±?3.4 kg. Diets were formulated with hay of cassava shoots (roughage) and a concentrate based on corn and soybean, with a roughage:concentrate ratio of 50:50, plus inclusion of cassava wastewater at the levels of 0, 12, 24, 36, or 48 g/kg of the total diet. Feeding behavior was evaluated between the 46th and 52nd days of the experiment. Increasing cassava wastewater levels in the diet reduced (P?<?0.05) the intakes (kg/day) of dry matter and neutral detergent fiber as well as the efficiency of rumination (g/cud and g/h) of dry matter and neutral detergent fiber. The other behavioral parameters were not affected by wastewater inclusion in the diet. Therefore, the inclusion of up to 48 g/kg of cassava wastewater on fresh matter of diets is not recommended for feedlot lambs.  相似文献   

Immunohistochemical expression of HER - 2 and Ki - 67 in granulosa cell tumor in bitches     

Ana Carina Heil da Silva Matos  Angélica Consalter  Bárbara Paula dos Santos Batista  Ana Beatriz Monteiro Fonseca  Ana Maria Reis Ferreira  Juliana da Silva Leite 《Reproduction in domestic animals》2021,56(4):667-672

Granulosa cell tumour, an ovarian neoplasm of stromal origin, is an important tumour related to oestrogenic dominance syndrome and cystic endometrial hyperplasia–pyometra complex. In order to analyse ovarian tumour´s malignant potential, immunohistochemical markers can be used, such as anti-HER2 and anti-Ki-67. The aim of this study was to evaluate the expression of immunohistochemical markers HER-2 and Ki-67 in granulosa cell tumour from bitches´ ovaries. In HER-2 immunomarker analysis using the HercepTest^® method, most tumours were classified as 2+ (moderate labelling). Concerning Ki-67 immunomarker, only one case was described as having a high proliferative index. An association was found between immunostained cell percentage by anti-HER-2 antibodies and high pleomorphism, represented by the pattern of follicular/trabecular tumour arrangement. There was no correlation between anti-Ki-67 and anti-HER-2 antibody immunostaining intensities, probably due to only one case with a high Ki-67 index. With an effective protocol for HER-2 and Ki-67 immunohistochemical identification in granulosa cell tumours in bitches, it was possible to characterize this neoplasm proliferation profile.  相似文献   

Fine structure of Henneguya pilosa sp. n. (Myxozoa: Myxosporea), parasite of Serrasalmus altuvei (Characidae), in Brazil     

Azevedo C  Matos E 《Folia parasitologica》2003,50(1):37-42

Henneguya pilosa sp. n., a new species of myxosporean from the gill filaments of the white piranha, Serrasalmus altuvei Ramirez, 1965 (Characidae), a freshwater teleost fish collected in the Zoological Garden of the city of Teresina (Piauí), Brazil, is described from light and transmission electron microscope observations. This myxosporean produced small plasmodia (up to 0.2 mm in diameter), each one containing all life-cycle stages of the parasite, including numerous spores. The spores, laterally compressed, averaged 54.2 (52.3-56.0) microm in total length and consisted of two unequal valves adhering together along the suture line and two caudal processes. The spore body measured 21.1 (20.0-23.1) microm in length, 5.9 (5.5-6.3) microm in width, and 2.2 (1.9-2.6) microm in thickness. The two equal ellipsoidal polar capsules of 7.4 (7.1-7.6) microm long and 1.2 (1.0-1.3) microm wide possessed a polar filament with 11-12 (rarely 13) turns. All surfaces of the spores were covered with a tightly adherent complex network of numerous densely ramified granulo-fibrillar masses, the longest measuring 1.5 microm long, observed around the caudal processes. The prevalence of infection was 30%. The taxonomic affinities of this parasite with other of the same genus in freshwater South American fish species are discussed.  相似文献   

Alternative low doses and routes of administering a prostaglandin F2�� analogue to induce luteolysis in Nelore cows     

Cezinande Meira  Valsair Matos Pessoa  Jo?o Carlos Pinheiro Ferreira  Gustavo Henrique M. Araujo  Marilu M. Gioso  Sony Dimas Bicudo  Eunice Oba  Cassia Orlandi 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(4):387-390

The present study was conducted in order to verify the efficacy of lower doses and alternative routes of a prostaglandin F2α analogue, luprostiol (PGF), for the induction of luteolysis and the precipitation of estrus in nonlactating Nelore cows (Bos taurus indicus). A conventional dose (15 mg) of PGF was compared to doses lower than the conventional dose, which ranges from 10 to 50%, that were administered intramuscularly (IM), intravulvosubmucosally (IVSM), or in the Bai-hui acupuncture site located within the lumbosacral area. The cows were administered PGF 8 day after estrus in the presence of a corpus luteum, and randomly assigned to the following groups: G1 (positive control), 15 mg, IM (n = 23); G2, 7.5 mg, IM (n = 23); G3, 3.75 mg, IM (n = 24); G4, 7.5 mg, IVSM (n = 25); G5, 3.75 mg, Bai-hui acupoint (n = 24); and G6, 1.5 mg, Bai-hui acupoint (n = 25). The results indicated that 50% of a conventional dose of PGF (7.5 mg) resulted in a complete luteal regression (plasma progesterone <1 ng/ml) at Hour 48, and hastened estrus, regardless of whether or not PGF was administered IM or IVSM. Comparatively, 10 or 25% of the conventional dose, even when administered to the Bai-hui acupoint, resulted in an initial reduction in the concentration of progesterone at Hour 24, followed by an increase observed at Hour 48. In conclusion, 25% of a conventional PGF dose administered via the Bai-hui acupoint proved inadequate to induce a complete luteal regression, whereas 50% of a conventional dose administered IM or IVSM was found to be the minimal dose required to induce effectively a complete luteal regression, and to precipitate the onset of estrus in nonlactating Nelore cows.  相似文献   

Prevalence of antimicrobial resistance in enteric Escherichia coli from domestic pets and assessment of associated risk markers using a generalized linear mixed model     

Liliana R. Leite-Martins  Maria I.M. Mahú  Ana L. Costa  Ângelo Mendes  Elisabete Lopes  Denisa M.V. Mendonça  João J.R. Niza-Ribeiro  Augusto J.F. de Matos  Paulo Martins da Costa 《Preventive veterinary medicine》2014

Antimicrobial resistance (AMR) is a growing global public health problem, which is caused by the use of antimicrobials in both human and animal medical practice. The objectives of the present cross-sectional study were as follows: (1) to determine the prevalence of resistance in Escherichia coli isolated from the feces of pets from the Porto region of Portugal against 19 antimicrobial agents and (2) to assess the individual, clinical and environmental characteristics associated with each pet as risk markers for the AMR of the E. coli isolates.  相似文献   

Interaction of the mutant genes B,og c,hp and t in the coloring of tomato fruit     

Thiago Matos Andrade  Wilson Roberto Maluf  Celso Mattes de Oliveira  Luiz Antônio Augusto Gomes  Daniela Costa Santos  Regis de Castro Carvalho  Ranoel José de Sousa Gonçalves  Álvaro Carlos Gonçalves Neto 《Euphytica》2015,205(3):773-783

  相似文献   

Implications and challenges of tuberculosis in wildlife ungulates in Portugal: a molecular epidemiology perspective     

Cunha MV  Matos F  Canto A  Albuquerque T  Alberto JR  Aranha JM  Vieira-Pinto M  Botelho A 《Research in veterinary science》2012,92(2):225-235

Mycobacterium bovis and, more rarely, Mycobacterium caprae, may cause zoonotic bovine tuberculosis (bTB) in an extensive range of animal species. In Portugal, during 2009, a remarkable raise of bTB incidence was registered in cattle along with an increase of new cases in wildlife. In this work, we reassess and update the molecular epidemiology of bTB in wild ungulates by including 83 new M. bovis and M. caprae isolates from wild boar and red deer obtained during 2008-2009. Spoligotyping identified 27 patterns in wild ungulates, including 11 patterns exclusive from deer and five from wild boar. The genetic relatedness of wildlife and livestock isolates is confirmed. However, the relative prevalence of the predominant genotypes is different between the two groups. Contrasting with the disease in livestock, which is widespread in the territory, the isolation of bTB in wildlife is, apparently, geographically localized and genotypic similarities of strains are observed at the Iberian level.  相似文献   

Myocardial damage and paroxysmal ventricular tachycardia in a dog after Albuterol intoxication     

Matos J  Jenni S  Fischer N  Bienz H  Glaus T 《Schweizer Archiv für Tierheilkunde》2012,154(7):302-305

Intoxication with the beta2-agonist Albuterol may lead to immediate signs of beta-adrenergic stimulation like excitation, tachypnea and tachycardia. Furthermore, it typically causes severe hypokalemia, which then leads to muscle weakness and which predisposes to ventricular arrhythmias. We describe a dog where albuterol intoxication caused runs of fast paroxysmal ventricular tachycardia that persisted after normalization of the hypokalemia. Based on a markedly elevated serum troponin I level acute myocardial damage was identified as cause of the tachyarrhythmia. Repeated Troponin I measurements and Holter-ECGs were the means to document complete cure.  相似文献   

Prognostic studies of canine and feline mammary tumours: the need for standardized procedures     

Matos AJ  Baptista CS  Gärtner MF  Rutteman GR 《Veterinary journal (London, England : 1997)》2012,193(1):24-31

For several years, veterinary oncologists have been struggling with the prognosis of mammary tumours in dogs and cats. Translation of tumour characteristics into prognostic information is an invaluable tool for the use of the most appropriate therapies, as well as for planning innovative therapeutic trials. Moreover, canine and feline spontaneous mammary gland tumours are good models for the study of human breast cancer. Collecting and interpreting information regarding the prognosis of canine and feline mammary tumours is difficult due to the fact that different methods have been applied to study various components and characteristics. This review identifies some of the challenges of prognostic studies of spontaneous canine and feline mammary tumours and suggests standardized procedures to overcome these challenges and facilitate reproducibility and assessment of results.  相似文献