In Uruguay, anthelmintic resistance (AR) is a wide spread phenomenon amongst sheep farms and the main resistant and abundan speciesis Haemonchus contortus (H.contortus). This study aimed to implement the adoption of a targeted selective treatment program using the Famacha© system, to reduce the selection pressure of resistant H.contortus among sheep, under extensive farming.

Desde el año 2002 y aproximadamente cada 5 años, INIA e INAC llevan a cabo un trabajo de investigación denominado "Auditoría de Calidad de Carne", con el objetivo general de caracterizar y determinar la calidad del ganado, de las canales y de la carne en el Uruguay. Este proyecto se enmarca en una línea de investigación de cooperación de INIA con la Universidad de Colorado (EEUU), quien aportó la metodología de trabajo.

ABSTRACT.- The aim of this study was to evaluate the effect of different factors on maternal protective behavior (MPB) of Nellore cows. A total of 3629 cows were evaluated around 24 h after calving, while their newborns were handled for navel care, ear tattoo and weighing. MPB was assessed by observing each cow reactions when its calf was caught in a corral pen. MPB score consisted of 5 levels, going from 1 (the cow paid no attention to the calf and remained indifferent to the procedure) to 5 (the cow showed aggressive behaviors toward the handler, trying to attack).

ABSTRACT.- A Mimosa pudica var. unijuga-associated toxicity affecting horses occurred in Araguari, Triângulo Mineiro, Southeast Brazil. Affected horses had gradual hair loss of the mane and tail and endocrine dermatosis after grazing for three months during the dry season on a paddock invaded by the plant. The main histological lesions include compact ortho-keratotic hyperkeratosis and numerous flame follicles. Toxicological analysis by HPLC-UV demonstrated 0.8 mg/g of mimosine in the leaves. © 2024 Published by Elsevier Ltd.

Los productores uruguayos carecían anteriormente de variedades de raigrás perenne con persistencia consistente y resistencia a enfermedades adaptadas a las condiciones locales, ya que la mayoría de los cultivares introducidos fueron desarrollados bajo condiciones ambientales diferentes. El desarrollo del cultivar Virazón tuvo como objetivo abordar esta brecha.

ABSTRACT.- Of the mycotoxicoses caused by molds contaminating grains or their byproducts, leukoencephalomalacia of horses and less frequently aflatoxicosis in cattle have been reported in South America. However, the most important group of mycotoxins in the region are those caused by fungi that infect forages and other types of plants and have regional distribution. In this group, ergotism is important, both caused by Claviceps purpurea infecting grains or by Epichloë coenophiala infecting Schedonorus arundinaceus.