Abanico Veterinario

Lippia graveolens and its activity against bacteria associated with bovine mastitis: Literature review

Jorge Vargas-Monter — 2025-02-10

Bovine mastitis is an infectious disease of the mammary gland caused by the invasion of pathogens, among them the bacterial etiology is one of the most important and the treatment of these infections has currently been complicated by the resistance generated by Gram positive bacteria and Gram negative to conventional antimicrobials. The objective of this research was to carry out a bibliographic review of Lippia graveolens and its activity against bacteria associated with bovine mastitis. Scientific reports on the phytochemical composition of wild oregano (L. graveolens) and the antibacterial activity against bacteria associated with bovine mastitis were consulted. The metabolites identified in L. graveolens with the highest reported antibacterial activity were naringenin, quercetin, luteolin as well as the terpenes thymol and carvacrol. L. graveolens contains secondary metabolites with reports of antibacterial activity, so it could be an alternative treatment against bacteria associated with bovine mastitis.

http://dx.doi.org/10.21929/abavet2025.2

e2024-34

https://www.youtube.com/watch?v=3ZIZSjJTTc4

Effect of turmeric and sulfated marine polysaccharides on productive variables and intestinal villi in laying japanese quail

Jennifer Pérez-Martínez — 2025-06-01

Antibiotics reduce the microbial load in the host and for decades were used as growth promoters, but this resulted in bacterial resistance. The objective was to evaluate plants containing natural bioactive compounds (turmeric) and sulfated marine polysaccharides (SMP) on productive behavior, organ weight and abdominal fat, egg quality, egg weight loss and intestinal villi height in quail. A total of 250 quail were used, where T1= control, T2 and T3= 0.02 % and 0.03 % of turmeric and T4 and T5= 0.02 % and 0.03 % of PMS respectively. With respect to the control, the addition of turmeric and SMP decreased the percentage of egg mass and laying, but improved the weight of the birds, although not the weight of the gizzard, proventriculus and abdominal fat (P>0.05); with respect to the levels, 0.03% of turmeric favored the loss of egg weight (P<0.0002); increasing the levels of turmeric decreased the height of the intestinal villi in the duodenum and jejunum (P<0.001). The level of 0.03 % SMP in laying quails increased egg weight and feed intake (P<0.05) which affected feed conversion (P<0.05). SMP decreased eggshell thickness (P<0.001), which caused egg weight loss, and also reduced the size of intestinal villi in the duodenum (P<0.01).

http://dx.doi.org/10.21929/abavet2025.6

e2024-A3

https://www.youtube.com/watch?v=1YjH0wIcT7w

Factors affecting the density of Vibrio parahaemolyticus in the hepatopancreas of shrimp Penaeus vannamei in production units in Northwest Mexico

Horacio Ramírez-Tirado — 2025-04-06

Vibrio parahaemolyticus acts as an opportunistic and primary pathogen in shrimp production units, causing Acute Hepatopancreatic Necrosis Disease (AHPND) and the much more virulent postlarvae glass disease (HLVD) than the AHPND strain. However, the variables that determine the density of this pathogen in production units are not yet clear. For this reason, the aim of this study was to determine the physical, chemical and biological variables that favour its development in the hepatopancreas of Penaeus vannamei shrimp, in the water and sediment of culture ponds. The research was carried out in commercial farms located on the northwest coast of Mexico. At each farm, water, sediment and shrimp samples were collected for bacteriological analysis (CHROMAgar Vibrio plate seeding), water quality (nitrite NO₂^-, nitrate NO₃^-, ammonium NH₄⁺, phosphate PO₄^3- and alkalinity CaCO₃), organic matter and pH (in sediment), as well as measurements of salinity, temperature, dissolved oxygen, pH (in water) and transparency. To analyse the association of physical, chemical and biological variables with the density of V. parahaemolyticus in the shrimp hepatopancreas, a Generalised Linear Model (GLM) was constructed. The model that best explained the data had an explained variance of 34.85%. Bacteriological examination showed that the northern and southern zones showed the highest average density of V. parahaemolyticus in the shrimp hepatopancreas. The model revealed a significant effect (P < 0.05) on the density of V. parahaemolyticus in culture pond water and sediment, culture cycle, dissolved oxygen, salinity, pH in culture water, NH₄⁺ and alkalinity. The evidence found for the effect of some of the factors on the density of V. parahaemolyticus in the shrimp hepatopancreas suggests constant monitoring to avoid densities detrimental to shrimp health.

http://dx.doi.org/10.21929/abavet2025.1

Estudio de Caso. Recibido: 17/07/2024. Aceptado:10/02/2025. Publicado: 06/04/2025. Clave: e2024-40.

https://www.youtube.com/watch?v=2TFB9Rujlu4

Identification and quantification of Eimeria spp. in rabbits from Mezquital Valley, Hidalgo

Juan Noguez-Estrada — 2025-02-10

The objective of this study was to identify and quantify species of the genus Eimeria present in naturally infected rabbits in the production units of Valle del Mezquital, Hidalgo state. Fecal samples were collected from 10 rabbit production units (RPUs) comprising 320 rabbits aged between 30 and 60 days (fattening period). Identification of Eimeria spp. species was carried out using the flotation technique, with criteria of measurement and morphological comparison. Oocysts per gram of feces (OPG) were determined using the McMaster technique. Parasite load data were normalized (√

Effect of fermentation with Aspergillus oryzae on the phytochemical and nutritional content of cereals

Faviola Ortiz-Robledo — 2025-04-29

The aim of this study was the fermentation of cereal grains with Aspergillus oryzae at different times (0, 3, 5 and 7 days) to increase the total phenolic, protein and condensed tannins content. Therefore, four cereal grains were used: corn, oat, barley and sorghum. Cereal grains were subjected to a solid-state fermentation with de Aspergillus oryzae. Higher increases of protein in corn, oat and sorghum were observed at 5 and 7 days of fermentation. In relation to phenolic content, the highest content was shown at 7 days of fermentation in all grains. Otherwise, condensed tannins showed higher contents in corn and sorghum at 5 days of fermentation; whereas, oat reached higher contents at 7 days. No changes were observed in barley among 3 and 7 days of fermentation time. In conclusion, solid state fermentation increased phytochemicals and nutritional contents by changing fermentation time.

http://dx.doi.org/10.21929/abavet2025.5

e2024-39

https://www.youtube.com/watch?v=ILxhUfRZRLA