Teódulo Quezada Tristan - Academia.edu (original) (raw)

Papers by Teódulo Quezada Tristan

Investigación y Ciencia: de la Universidad Autónoma de Aguascalientes, 1996

Investigación y Ciencia: de la Universidad Autónoma de Aguascalientes, 2001

PubMed, Jan 11, 2018

Background: This work studied the natural infection of Neospora caninum during the first gestatio... more Background: This work studied the natural infection of Neospora caninum during the first gestation of heifers in a dairy farm in animals consuming a ration co ntaminated naturally with Zearalenone (ZEA), and to find out effect of mycotoxin in the levels of estrogen (E) and progesterone (P4) and that's relation to the infection to N. caninum and in the abortions. Methods: The study was conducted in a dairy farm located in El Llano municipality, in Aguascalientes, Mexico, in 2013. Two groups were formed, the group "A" with 20 seronegative animals to N. caninum, and group "B" with 20 seropositive. Once a month was determined the levels of total IgG to N. caninum, the serum concentration of E and P4, and the level of ZEA in the ration; in cases of abortion, fetal brain samples were taken to identify the presence of N. caninum DNA. Results: In group "A", was observed two subgroups: seronegative (60%) and seroconverted (40%), and three abortions. In group "B", all animals maintain their serostatus, and three animals aborted. All abortions were positive for N. caninum DNA. The level of ZEA in the ration has an average of 426 μg/kg; during the gestation did not identify that animals suffer any alteration in the levels of E or P4. No statistical differences among the studied variables (levels of E and P) in time (nine months of gestation) were detected. It was not identified any interaction with the natural exposure to ZEA intake in any of the groups under study. Conclusion: The chronic ingestion of ZEA does not affect serum concentrations of E and P4 during gestation of heifers under study and cannot be related to the infection for N. caninum and the abortion.

Toxicology Letters, Oct 1, 2018

Estudio comparativo de la concentración del glutatión reducido y actividades de ammaglutamiltrans... more Estudio comparativo de la concentración del glutatión reducido y actividades de ammaglutamiltransferasa y transferasa de glutatión en hígado y riñón de pollos y ratas

Toxicology Letters, Oct 1, 2017

Abanico veternario, Sep 1, 2018

The objective was to determine the effect of black tuna meal (BTM) at different concentrations an... more The objective was to determine the effect of black tuna meal (BTM) at different concentrations and time of addition, in chicken diets on production variables, quality, and concentration of fatty acids in eggs and sensory evaluation. A 3 x 4 factorial design was used. Increasing the concentration of BTM modified the production variables. The cholesterol level was higher with 3% of BTM, the total lipids were increased at the time, the highest level was the control and the lowest with 3%, the Decosahexaenoic acid (DHA) was greater than 3% of BTM, the alpha-linolenic acid (ALA) did not obtain differences, arachidonic acid (AA) and linoleic acid (LA) showed their lowest values with 2% of BTM. As for the sensory evaluation, color, smell, and taste were well accepted. Therefore, it is concluded that BTM can be used to enrich the nutritional values of the bird´s diet. Omega 3, black tuna meal, egg, production, hen, posture. RESUMEN El objetivo fue determinar el efecto de la harina negra de atún (HNA) a diferentes concentraciones y tiempo de adición en dietas para gallina sobre variables de producción, calidad y concentración de ácidos grasos en el huevo y evaluación sensorial. Se utilizó un diseño factorial 3 x 4. Se modificaron las variables de producción al aumentar la concentración de HNA. El nivel de colesterol fue mayor con 3 % de HNA, los lípidos totales se aumentaron al tiempo, el nivel más alto fue el testigo y el más bajo con 3 %, el ácido docosahexaenoico (DHA) fue mayor al 3 % de HNA, el ácido alfa linolénico (ALA) no obtuvo diferencias, el ácido araquidónico (AA) y el ácido linoleico (LA) mostraron sus valores más bajos con un 2 % de HNA. En cuanto a la evaluación sensorial color, olor y sabor tuvieron buena aceptación. Por lo que se concluye que la HNA puede ser utilizada para enriquecer los valores nutricionales de la dieta de las aves. Omega 3, harina negra de atún, huevo, producción, gallina, postura.

Research Square (Research Square), Sep 8, 2020

Background: Blood biochemistry and reference intervals help to differentiate between healthy and ... more Background: Blood biochemistry and reference intervals help to differentiate between healthy and ill patients as well as to provide information for the prognosis, evaluation, and monitoring of a patient; however, these intervals are often obtained from adult animals. It is essential, hence, to understand that puppies and adults are physiologically different, which justi es the need to obtain age-speci c biochemical reference intervals. The aim of this research was to assess the potential effect of age, sex, breed, and interaction on routine biochemical analytes and physiological constants (body temperature, heart rate, and respiratory rate) in addition to establish age-speci c reference intervals. In order to carry out the research, we selected 197 healthy dogs of different sex and breed classi ed by age: group I (4-8 wk), group II (9-24 wk), group III (25-52 wk), and group IV (>52 wk). The biochemical analysis measured the enzymatic activity of aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), and concentration of cholesterol, triglycerides, total proteins, albumin, globulins, glucose, urea, and creatinine. Statistical analyses used the Analysis of Variance (ANOVA) and General Linear Model (GLM), which allows the comparison of multiple factors at two or more levels (p < 0.05). Results: The results of this study showed that ALT, total protein, albumin, globulin, urea, creatinine, and body temperature levels were lower in puppies compared to adult dogs (p < 0.05) while the enzymatic activity of ALP, LDH, glucose concentration, and heart rate were higher. Moreover, in small breeds, the serum creatinine levels were lower (p < 0.05) whereas sex and interaction did not show a signi cant effect (p > 0.05). Conclusions: Some biochemical components evince in uence by age. For this reason, this research offers speci c reference intervals to help the veterinary clinician to interpret the biochemical results of puppies with accuracy.

Toxicology Letters, Oct 1, 2015

Frontiers in Veterinary Science

Red blood cells (RBC) morphologic evaluation through microscopy optical (OM) and SEM, provides in... more Red blood cells (RBC) morphologic evaluation through microscopy optical (OM) and SEM, provides information to forecast, evaluate, and monitor the functioning of many organs. Factors, such aging and diseases affect RBC morphology in both, human and animals. SEM is useful to evaluate RBC morphology, although its use in diagnosis and evaluation in dogs is limited, due to the availability and cost. The aim of this research was to assess the normal RBC morphology in adult, senior and geriatrician dogs, clinically healthy by OM and SEM. In addition to evaluating the age effect, sex, body size, and their interaction on erythrocyte morphometry. To carry out the research 152 blood samples were evaluated from dogs of different sexes and body sizes (small, medium, and large). Three groups were made based on dogs age: group I adults (1–7.9 years old), group II senior (8–11.9 years old), and group III geriatricians (>12 years old). Erythrocyte parameters were evaluated by OM (diameter, height...

Toxins

Contamination of food chains by toxigenic fungi and aflatoxins is a global problem that causes da... more Contamination of food chains by toxigenic fungi and aflatoxins is a global problem that causes damage to human health, as well as to crop and livestock production. The objective is to evaluate Aspergillus flavus and total aflatoxins (AFs) occurrence in totally mixed rations (TMRs) for dairy cows and aflatoxin M1 (AFM1) in milk for human consumption. Ninety-nine dairy production units located in Aguascalientes, Mexico, were randomly selected, and samples were collected from TMRs, raw milk, and milk marketed in the city in two consecutive agricultural cycles. AFs were quantified in TMRs and milk by indirect enzyme immunoassay and HPLC; aflatoxigenic and molecular (PCR) capacity of monosporic A. flavus isolates in the feed was characterized. All feed, raw, and pasteurized milk samples showed aflatoxin contamination (26.0 ± 0.4 µg/kg, 32.0 ± 1.0, and 31.3 ± 0.7 ng/L, respectively), and a significant proportion (90.4, 11.3, and 10.3%) exceeded the locally applied maximum permissible limi...

Toxicology Letters

In conclusion, analysis of genes showing exposure time specific changes more closely reflects tim... more In conclusion, analysis of genes showing exposure time specific changes more closely reflects time-dependent pathological changes in lung injury.

Abanico Veterinario, 2021

De acuerdo con la declaración del 27 de abril de 2020 de la Organización Mundial de la Salud (OMS... more De acuerdo con la declaración del 27 de abril de 2020 de la Organización Mundial de la Salud (OMS), el 31 de diciembre de 2019 se confirmó la presencia de un nuevo coronavirus, causante de múltiples casos de neumonía en la ciudad de Wuhan, China. Por su propagación y gravedad, el 11 de marzo de 2020 la OMS declaró que se había alcanzado el nivel de pandemia (OMS, 2020). En México, el 24 de marzo de 2020, en el Diario Oficial de la Federación (DOF) se publicó un acuerdo para establecer medidas preventivas y mitigar los riesgos de salud provocados por el SARS-CoV2 (covid-19). Esta pandemia ha hecho del 2020 un año sumamente retador para el mundo entero. En Aguascalientes, México, continuamos con la vida habitual durante el primer trimestre; sin embargo, la última semana de marzo nuestra universidad emprendió medidas sanitarias para proteger a su comunidad, entre las que se encontraban el confinamiento, la implementación de cursos a distancia y la suspensión de todos los encuentros aca...

DOCERE, 2010

La carrera del Médico Veterinario Zootecnista (MVZ) es tal vez una de las más extensas y compleja... more La carrera del Médico Veterinario Zootecnista (MVZ) es tal vez una de las más extensas y complejas que existen. Los Médicos Veterinarios Zootecnistas tienen su campo de acción en áreas tan variadas que su preparación académica y profesional requiere de un enorme abanico de conocimientos, habilidades y aptitudes.

The nutritional quality and potential use of apple bagasse (BM) in diets for ruminants when silag... more The nutritional quality and potential use of apple bagasse (BM) in diets for ruminants when silage (microsilos) with two nitrogenous sources (FN) [urea (U), sow (C)], a commercial inoculant (I) was evaluated and Chloris gayana as moisture adherent [80/20 w/w, dry matter (MS)]. The study was conducted in Aguascalientes, Mexico (2014-2016). The treatments: a) BM; b) BM+I; c) BM+U; d) BM+U+I; e) BM+C and f) BM+C+I were analyzed in a completely randomized design (DCA) with factorial arrangement [3 FN (U, C, without FN) × 2 I (with I, without I)]. At 45, the MS of silage was similar between treatments, and lactic and acetic acids increased in greater proportion to propionic and butyric acids. The addition of C (BM+C and BM+C+I) increased the final crude protein (PC) (increments of 8 and 7.44 g 100 g-1 MS) although the pH increased (4.33 and 3.91 vs. 3.41 ±0.03) of the ensilage. Considering the content of PC and fermentation standards, the BM silage with C has the stability and sufficient...

Toxins, 2021

Since its first patent (1897), commercial dry feed (CDF) for dogs has diversified its formulation... more Since its first patent (1897), commercial dry feed (CDF) for dogs has diversified its formulation to meet the nutritional needs of different breeds, age, or special conditions and establish a foundation for integration of these pets into urban lifestyles. The risk of aflatoxicosis in dogs has increased because the ingredients used to formulate CDF have also proliferated, making it difficult to ensure the quality required of each to achieve the safety of the entire CDF. This review contains a description of the fungi and aflatoxins detected in CDF and the ingredients commonly used for their formulation. The mechanisms of action and pathogenic effects of aflatoxins are outlined; as well as the clinical findings, and macroscopic and microscopic lesions found in aflatoxicosis in dogs. In addition, alternatives for diagnosis, treatment, and control of aflatoxins (AF) in CDF are analyzed, such as biomarkers of effect, improvement of blood coagulation, rate of elimination of AF, control of...