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546,196 artículos
Año:
2023
ISSN:
2448-6760
Almadaly, Essam A.; Sahwan, Ferial; Wael B, El Domany; M. Fawzy, Ahmed; Shukry, Mustafa; Farrag, Foad
Facultad de Medicina Veterinaria y Zootecnia
Resumen
This study investigates the effect of estrus synchronization on the reproductive performance of Ossimi ewes during the early summer season to prove that they are cyclic throughout the year in subtropical climates. In June, 280 ewes were assigned to seven (n = 40) groups and received one of the following: 1) short-term progesterone (ST) P4 treated ewes received 20 mg P4 day after day for 6 days and 500 international unit (IU) equine chorionic gonadotropin (eCG) on day 6; 2) long-term P4 (LT) P4 treated ewes received 20 mg P4 day after day for 12 days and 500 IU eCG on day 12; 3) double prostaglandin (PG) F2α 7days apart and 500 IU eCG on day 7 (PGF2α-7d); 4) double PGF2α 14 days apart and 500 IU eCG on day 14 (PGF2α-14d); 5) traditional ovulation synchronization (T-Ovsynch; gonadotropin-releasing hormone (GnRH)-0 day; PGF2α-5 day and GnRH-7 day); 6) non-traditional ovulation synchronization (NT-Ovsynch; GnRH-0 day; PGF2α-7 day and GnRH-9 day); 7) control ewes received no treatment. There were significant differences among groups for estrus rate, the onset of estrus, pregnancy, and lambing rates as well as prolificacy and gestation period. The highest (90 %) estrus rate was recorded in (LT) P4, PGF2α-14d, and NT-Ovsynch protocols while the lambing rate was the maximum (100 %) in PGF2α-14d. Although all treatments had a positive effect on ewe fertility; long-term protocols particularly PGF2α-14d; are recommended to improve Ossimi ewe fertility during the early summer season.
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Año:
2023
ISSN:
2448-6760
Ángeles-Torres, Luis Enrique; Ducoing-Watty, Adriana Margarita; Silva-Castillo, René Oswaldo; Villavicencio-Oropeza, Amalia; Maldonado-Reséndiz, Ricardo Itzcóatl
Facultad de Medicina Veterinaria y Zootecnia
Resumen
This study describes the diversity of the species received for medical evaluation at the Exotic Pet and Wildlife Teaching Hospital in Mexico; identifying the most common non-traditional companion animals owned, the frequency of the species received along the years, and which of those correspond to native Mexican wildlife. This retrospective descriptive study comprised 8 619 patient records from 2009 to 2019. During the period analyzed, 129 species were identified, 60 of these being native Mexican wildlife. Most of the patients received were mammals (56.36 %) followed by reptiles (38.73 %), and 4.91 % remaining were composed by birds, amphibian, fish and invertebrate species. Eight species contributed to the highest percentage of the records (79.88 %), being the red-eared slider (Trachemys scripta elegans) the most common (18.71 %). The number of annual records varied through the period with a trend for increased demand recently. It was possible to identify changes in the frequency of visits of different species over the study period, which allowed us to determine that the preference for the maintenance of some species in captivity has decreased. Commonly received species identification allows veterinary medicine students to specialize and develop the required species-specific medical competencies.
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Año:
2023
ISSN:
2448-6760
Nie, Dayi; Tang, Haiming; Lin, Yi; Liu, Jiazhong; Gui, Jianfeng; Zhao, Na; Zhang, Endi; Chen, Min
Facultad de Medicina Veterinaria y Zootecnia
Resumen
The haematological and biochemical parameters of endangered wild animals in gestation can provide the knowledge of normal physical conditions and recognition of every abnormality, then contribute to conservation and management. For better breeding management of Chinese water deer (Hydropotes inermis) reintroduced population, a series of haematological and biochemical parameters were tested and analyzed, viz. white blood cells (WBC), red blood cells (RBC), haemoglobin (HGB), packed-cell volume (PCV), platelet count (PLT), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), mean corpuscular volume (MCV), mean red blood cells distribution width coefficient of variation (RDW) and different hematological parameters viz. total protein (TP), albumin (ALB), globulin (GLB), albumin to globulin ratio (A/G), total bilirubin (TBIL), alkaline phosphatase (ALP), γ-glutamyl transferase (GGT), alanine aminotransferase (ALT), aspartate aminotransferase (AST), AST/ALT, creatinine, urea (BUN), uric acid, total cholesterol (TC), triglyceride, creatine kinase (CK), lactate dehydrogenase (LDH) and cortisol. The WBC value of non-pregnants was significantly higher than that of pregnants; the total cholesterol and total bilirubin concentration was significantly lower in pregnants. The hematological and serum biochemical parameters to change when the pregnant Chinese water deer pregnancy, which could be used in health monitoring and disease diagnosis of the Chinese water deer and reference for other cervids.
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Año:
2023
ISSN:
2448-6760
Rubio-Rocha, Yamel G.; Gaxiola, Soila M.; Chávez, Cuahtémoc; Ceballos, Gerardo; Bojorquez, Cristal; Diaz, Daniel
Facultad de Medicina Veterinaria y Zootecnia
Resumen
A scoping review was conducted to map, summarize, and understand the extent of evidence on jaguar (Panthera onca) food resource use and its interaction with humans. A total of 105 studies were identified in electronic databases: 57 analyzed jaguar food resource use, and 48 described jaguar interactions with humans. The studies were published in 51 journals, mainly in English, from 1993–2021 in 14/19 countries where jaguars live. The evidence demonstrated the variability and prey consumption of the jaguar; there are contrasting results regarding the diversity of prey consumed. The frequency of livestock predation was found to be related to the abundance and availability of natural prey and the distance of ranches from the jaguar habitat. The interaction of the jaguar with humans presented an interesting and contrasting picture, since the perception of the jaguar varied depending on the sociocultural context and the study site. The results showed a negative effect of human activities on the distribution and density of the feline, and there was evidence of poaching and attacks on humans, although the information was insufficient to determine the causes in depth. More research and dissemination are needed on these issues at the local level in the regions where the jaguar lives, as these are the areas where decisions and actions are needed to conserve the jaguar in coexistence with communities and livestock.
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Año:
2023
ISSN:
2448-6760
Gutiérrez, Lilia; Sumano, Héctor; Ocampo, Luis; Nieto, Agustín; Aquino, Itzcoatl
Facultad de Medicina Veterinaria y Zootecnia
Resumen
Benzylpenicillin-G (BP-G) is one of human and veterinary medicine’s most widely used antibacterial drugs. It represents a large market for the Pharmaceutical Industry, and various combinations with frail pharmacological support have been made available to veterinarians. The crystalline sodium and potassium salts of BP-G and the benzathine salt of BP-G have been incorporated into many existing preparations, arguing that higher and more prolonged concentrations are obtained. However, there are not evidence published. Notwithstanding the above, these preparations are presented as sustained-release ones and capable of achieving therapeutic concentrations. There are no pharmacokinetic bases for such combinations of BP-G derivatives. It is unlikely that such combinations provide better serum profiles than those offered by an adequate dose of only procaine BP-G. The incorporation of the BP-G benzathine is prohibited in many countries. In Latin America, such combinations limit the amount of procaine BP-G that should be injected, ideally ≥ 20 000 IU/kg of body weight every 12-24 h. Within the framework of the rational use of antimicrobial drugs in veterinary medicine advanced by the World Health Organization (WHO) and based on pharmacological considerations, it is proposed that combinations of BP-G derivatives be restricted, allowing only BP-G procaine preparations. Also, formulations of BP-G incorporating other active principles should offer solid pharmacological support. To date, combined preparations of BP-G have shown no formal pharmacological support. Based on the information presented in this review, it is feasible to conclude that the only BP-G derivative that should be available for veterinary medicine is procaine BP-G.
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Año:
2023
ISSN:
2448-6760
Nuñez Soto, Sandra Giovanna; Berruecos Villalobos, José Manuel; Cala Moreno, Nelson; Magaña Monforte, Juan Gabriel; Ochoa Galván, Pedro; Ulloa Arvisu, Raúl; Toledo Alvarado, Hugo O.
Facultad de Medicina Veterinaria y Zootecnia
Resumen
Global climate change has made heat stress tolerance an important trait to be considered in breeding programs to improve the resistance of productive animals to unfavorable environmental conditions. The aim of this study was to know the association between single nucleotide polymorphism (SNP) markers and heat stress resistance through a genome-wide association study (GWAS). Where 95 Brown Swiss dairy cows have measured body temperatures, respiratory frequencies, and genotypes. Seven SNP were detected with a statistically significant effect (P < 0.01) on respiratory frequency under heat stress. The markers with the highest association are in the Bos taurus autosome 6 (BTA 6), e.g. the BovineHD0600010397 SNP located within the FAM13A gene, and the BovineHD0600012612 SNP located within the PI4K2B gene. The ARS-BFGL-NGS-102407 SNP that is located in BTA 4 is the SNP that presents the highest number of associations to genes. Most of the genes are involved in cellular processes that are present in the resistance of individuals to high and humid environmental temperatures. These results provide new insights into the genetics of heat stress tolerance in Brown Swiss cattle in Yucatan, Mexico.
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Año:
2023
ISSN:
2448-6760
Díaz-Echeverría, Víctor Francisco; Velmar-Chan, Veimer; Santos Ricalde, Ronald Herve; Segura-Correa, José Candelario; Pat-Ake, Ismael; Chavarria-Diaz, Addy Consuelo; Oros-Ortega, Iván; Casanova-Lugo, Fernando; Cen Hoy, Amelia; Kim Barrera, Candita
Facultad de Medicina Veterinaria y Zootecnia
Resumen
We evaluated the effect of different dietary Tithonia diversifolia (TD: 0, 10, 20, and 30 %) on productive traits, egg quality, and economic efficiency in laying hens. Feed intake was higher in hens fed the 20 and 30 % TD diets (120.6 and 119.0 g/day) compared with those fed the 0 or 10 % TD diets (P < 0.0010). Feed egg weight conversion increased with dietary TD inclusion (P < 0.0010). The laying rate was higher (P < 0.0020) in hens on 0 and 10 % TD diets (94.5 and 94.6 %, respectively) than those on 20 and 30 % TD diets (89.7 and 84.9 %). Eggs and yolks were heavier in hens fed 0, 10, and 20 % TD compared with those fed the 30 % TD diet (P <0.0020 and P < 0.0040, respectively), which also had poorer albumen width (P < 0.0010). The yolk had a more intense yellow as the level of dietary TD increased (P < 0.0001). Dietary TD did not affect economic efficiency. In summary, the inclusion of up to 10 % TD in laying hen diets seems feasible as it did not affect productive traits, economic efficiency, and egg quality traits.
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Año:
2023
ISSN:
2328-1308
Salazar Andreu, Juan Pablo
Instituto de Estudios Auriseculares (IDEA)
Resumen
En el paso del siglo XVII al XVIII, el cambio de dinastías que ocuparían el trono castellano y, por tanto, la titularidad sobre los territorios ultramarinos, acarrearon también grandes cambios a la Nueva España. En la Ciudad de Puebla de los Ángeles, este se presentaría inicialmente con una sede episcopal vacante, que pronto sería ocupada por García de Legazpi Velasco y Altamirano que tuvo entre los asuntos a atender, el regalismo de la Casa de Borbón y el inicio del despotismo ilustrado y conflictos con las autoridades temporales de Puebla.
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Año:
2023
ISSN:
2328-1308
Carrizo, Walter José
Instituto de Estudios Auriseculares (IDEA)
Resumen
El género literario de los libros de caballerías castellanos (siglos XVI-XVII) conserva muchas categorías monstruosas de la literatura caballeresca medieval. Sin embargo, sus gigantes, enanos, dragones, salvajes e híbridos conviven con seres de raíz grecolatina, como basiliscos, centauros y minotauros. A ellos podemos añadir los pigmeos, raza extraordinaria de hombres de pequeñas dimensiones que hace su aparición, bajo la denominación de «pineos», en el último de sus títulos originales impresos: el Policisne de Boecia (1602), de Juan de Silva y de Toledo. No obstante, debido a que muchos portentos procedentes de la tradición teratológica clásica aparecen en los libros de caballerías hispánicos mostrando cambios figurativos y/o de significado derivados de su paso por el Medioevo, cabe preguntarse si los pineos del Policisne se ven atravesados o no por la mirada transformadora de la época medieval, además de por la perspectiva particular sobre los seres humanos maravillosos del propio género. Este es, precisamente, el interrogante que guía este artículo, el cual pretende analizar su apariencia y comportamiento, con el fin de determinar sus sentidos; grado de fidelidad a sus precedentes antiguos, y si exhiben o no huellas de la reconceptualización medieval de las criaturas fabulosas grecorromanas.
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Año:
2023
ISSN:
2328-1308
Borrego Gutiérrez, Esther
Instituto de Estudios Auriseculares (IDEA)
Resumen
Teresa de Jesús fue una gran aficionada a celebrar las fiestas litúrgicas e implantó esa costumbre en las primitivas fundaciones. Ella misma compuso villancicos, poemas líricos a diversas festividades, pero también a profesiones y tomas de hábito. Los conventos del reciente Carmelo Reformado celebraban con música, teatro y poesía los distintos hitos del año litúrgico, sobre todo la Navidad, pero también las profesiones de las religiosas y otras fiestas como el Corpus, las de determinados santos o advocaciones de la Virgen María, entre otras. Muchas carmelitas tomaron la pluma, siguiendo la huella de la fundadora, y escribieron centenares de textos para alegrar estas fiestas, la mayoría inéditos. La tarea de descubrir estos textos es apasionante, y contribuye a la recuperación de un patrimonio único de nuestros Siglos de Oro: la literatura olvidada que fue escrita por mujeres.
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