RESUMO
Various animal models are used for research; however, non-human primates are well suited for biomedical research owing to their genetic homology with humans. The objective of this research was the anatomical characterization of red howler's kidneys in view of the scarcity of information in the literature. Protocols were approved by the Committee for Ethics in the Use of Animals at the Federal Rural University of Rio de Janeiro (number 018/2017). The study was conducted at the Laboratory of Teaching and Research in Domestic and Wild Animal Morphology, Federal Rural University of Rio de Janeiro. Specimens of Alouatta guariba clamitans were collected from the Serra dos Órgãos National Park road in Rio de Janeiro and subsequently frozen. Four adult cadavers (two males and two females) were used, identified, and injected with a 10% formaldehyde solution. Later, the specimens were dissected, and measurements and topography of the kidneys and renal vessels were recorded. The kidneys of A. g. clamitans resemble a "bean seed," with a smooth surface. The longitudinal section shows two distinct regions, cortical and medullary; in addition, the kidneys are unipyramidal. The renal arteries emerged from the abdominal aorta as a single vessel posterior to the renal veins. The renal veins drained directly into the caudal vena cava as a single vessel in all specimens.
Vários modelos animais são usados para pesquisa, no entanto, primatas não humanos são adequados para pesquisas biomédicas devido à sua homologia genética com humanos. O objetivo desta pesquisa foi a caracterização anatômica dos rins do Bugio, tendo em vista a escassez de informações na literatura. Os protocolos foram aprovados pelo Comitê de Ética no Uso de Animais da Universidade Federal Rural do Rio de Janeiro (número 018/ 2017). O estudo foi realizado no Laboratório de Ensino e Pesquisa em Morfologia de Animais Domésticos e Silvestres da Universidade Federal Rural do Rio de Janeiro. Espécimes de Alouatta guariba clamitans foram coletados da estrada para o Parque Nacional da Serra dos Órgãos no Rio de Janeiro, e posteriormente congelados. Foram utilizados quatro cadáveres adultos (dois machos e duas fêmeas), identificados e injetados com solução de formaldeído a 10%. Os rins de A. g. clamitans assemelham-se a uma "semente de feijão", com superfície lisa. Ao corte longitudinal apresenta duas regiões distintas, cortical e medular, além disso, apresenta-se unipiramidal. As artérias renais emergiram da aorta abdominal como um único vaso, posteriormente às veias renais. As veias renais drenaram diretamente para a veia cava caudal como um único vaso em todos os espécimes.
RESUMO
El Didelphis aurita, conocido como comadreja de orejas negras, es un marsupial con amplia distribución en la América del Sur, frecuente tanto en los ambientes silvestres como antrópicos debido a su gran plasticidad ecológica. Animales de esta especie son comúnmente atendidos en la medicina de animales silvestres y vienen siendo empleados como modelos experimentales alternativos a especies tradicionales. El objetivo de ese trabajo fue relatar la ocurrencia de un caso de vena renal doble en un espécimen adulto, macho, de D. aurita. Para eso, se ha disecado un cadáver fijado y conservado en solución de formaldehído 10%, previamente inyectado con látex de color azul por la porción torácica de la arteria aorta para facilitar la disección. El espécimen poseía dos venas renales derechas, una vena craneal (11,3 mm) y otra caudal (10,0 mm) que drenaban distintamente para una vena cava caudal. La vena renal izquierda y las arterias renales eran únicas. Aunque la duplicidad de la vena renal es reportada en otras especies como perros, gatos y felideos silvestres, este es el primer relato en el género Didelphis. El conocimiento de las variaciones anatómicas vasculares es relevante para la correcta ejecución de procedimientos veterinarios y en la interpretación de hallazgos experimentales en relación con el sistema urogenital.
Didelphis aurita, known as black eared oposum, is a marsupial widely distributed in South America, frequently seen in both wild and anthropogenic environments due to its great ecological plasticity. This species is commonly treated in wildlife veterinary services and has been used as alternative experimental models instead of conventional species. The aim of this report was to describe a case of double renal vein in a male, adult, specimen of D. aurita. In order to make the dissection easier, the cadaver was fixed and preserved in 10 % formaldehyde solution, and previously injected with latex in blue color by the thoracic aorta to facilitate dissection. The specimen had two right renal veins, one cranial (11.3 mm) and other caudal (10.0 mm) that drained distinctly for caudal vena cava. The left renal vein and the renal arteries were single. Although double renal vein has been reported in other species, such as dogs, cats and wild felids, this is the first mention in the genus Didelphis. The knowledge of the vascular anatomical variations is relevant for the correct execution of veterinary procedures and the interpretation of experimental findings in urogenital system research.
Assuntos
Animais , Gambás , Animais Selvagens , Sistema Cardiovascular , Didelphis , MarsupiaisRESUMO
A new species of coccidia (Protozoa: Apicomplexa: Eimeriidae) found parasitizing the white-eyed parakeet Psittacara leucophthalmus (Müller, 1776) in Brazil is described. Eimeria psittacarae n. sp. has oocysts that are ellipsoidal, 34.8 × 24.3 µm, with smooth, bilayered wall, ~1.7 µm thick. Micropyle present. Oocyst residuum absent, but one or two polar granules are present. Sporocysts are elongate ellipsoidal, 19.2 × 9.7 µm. Stieda body knob-like and sub-Stieda body rounded. Sporocyst residuum is composed of granules that appear to be membrane-bounded. Sporozoites are vermiform with one refractile body and a nucleus. This is the sixth description of an eimeriid coccidium parasitizing a New World psittacine.
