Descrição, constituição e aspectos associados à formação dos fetos Perosomus elumbis / Description, composition and aspects associated with the formation of fetus Perosomus elumbis / Descripción, composición y aspectos asociados a la formación de fetos Perosomus elumbis

O feto Perosomus elumbis está inserido num vasto grupo de doenças congênitas raras e de etiologias desconhecidas dentro da medicina veterinária. Por ser de baixa ocorrência, e de difícil acesso e investigação científica, há dificuldade em realizarem-se estudos e conclusões sobre a doença. Com sobrevida máxima de dois dias, sendo a maioria dos fetos natimortos, a anomalia caracteriza-se principalmente por agenesia (ausência ou formação incompleta de um órgão) parcial da medula espinhal, terminando em fundo cego nas últimas vértebras torácicas, e ausência de vértebras lombares, sacrais e coccígeas, convergindo para anomalias secundárias que envolvem artrogripose (flexão ou contratura congênita de uma articulação), atrofia muscular de membros pélvicos e outras malformações subsequentes. Observa-se também a possibilidade de ocorrer anormalidades congênitas concomitantemente à formação desses fetos.

The fetus Perosomus elumbis is inserted in a wide group of rare diseases congenital of etiology unknown in medicine veterinary. Being of low occurrence, hinder study and conclusions about the disease. With maximum survival of two days, being the most of stillbirth fetus, the anomaly is characterized principally by agenesis partial of spinal cord, finishing in the last thoracic vertebrae, and absence of formation of vertebra, diverging to malformation secondary that involve arthrogryposis, atrophy muscular of articulations pelvic and others malformations subsequent. It is also observed the possibility of congenital abnormalities occur concurrently with the formation of these fetuses.

El feto Perosomus elumbis se inserta en una amplia gama de enfermedades congénitas raras y con etiologías desconocidas en Medicina Veterinaria. Debido a su baja incidencia, y de difícil acceso e investigación científica, hay dificultad en realizar estudios y conclusiones acerca de la enfermedad. Con un máximo de supervivencia de dos días, la mayoría de los fetos nacidos muertos, la anomalía se caracteriza principalmente por agenesia parcial de la médula espinal (ausencia o formación incompleta de un órgano), que termina ciegamente en la última vértebra torácica, y ausencia de vértebras lumbares, sacras y coccígeas, que convergen en anomalías secundarias involucrando artrogriposis (flexión o contractura congénita de una articulación), atrofia muscular de miembros pélvicos y otras malformaciones subsecuentes. También se observa la posibilidad de ocurrir anormalidades congénitas concomitantemente a la formación de esos fetos.

Anti-Neospora caninum antibody detection and vertical transmission rate in pregnant zebu beef cows (Bos indicus): Neospora caninum in pregnant beef cows (Bos indicus).

The aim of the present study was to evaluate anti-Neospora caninum antibodies and the vertical transmission rate in naturally infected pregnant zebu beef cows (Bos indicus) reared on pasture. The present study began with 200 cows from four farms (50 cows from each farm), and these animals were submitted to timed artificial insemination (TAI). After ultrasonography, 76 pregnant cows were selected, 22, 15, 22, and 17, respectively, from farms 1, 2, 3, and 4. Blood samples were taken from cows thrice during the first, second, and third trimester of gestation, and a blood sample was collected from 31 calves before colostrum milking. From 76 cows 23 (30.3%) had anti-N. caninum antibodies detected by indirect ELISA (Idexx), and 53 (69.7%) did not. Sixty-four cows that initiated the experiment were negative to N. caninum and 11 became positive either during the second or third trimester of gestation, this mean an infection incidence of 17.2% (11/64). OD for ELISA was higher (OD=2.08) during the second and third (OD=2.10) trimesters of pregnancy when compared with the first (OD=1.81), however, there were no statistical differences (P=0.45). The vertical transmission was calculated to be 29.0% (9/31), and the risk of vertical transmission of N. caninum in seropositive dams was 26.25 times higher than seronegative animals (OR=26.25, 2.38