Sur l'Involution de la Bourse de Fabricius chez le Canard

On the involution of the bursa of Fabricius of the duck
The morphological and structural aspects of the functional aspects of the involution were studied light- and electronmicroscopically in ducks 90 to 150 days old. The first involutionary changes were observed in the interfollicular connective tissue around day 100. Following this, cells left the periphery of the follicles; they were connected with collagen fibers and positioned themselves between the lymphocytes of the cortex that became thinner before it disappeared.
On day 135 the medulla lost its lymphocyte content through wide ducts which opened directly into the lumen of the bursa. On day 150 the bursa experienced a massive overgrowth; almost all follicles had disintegrated and only small groups of cells remained which consisted principally of reticuloepithelial cells and some lymphocytes.
Cysts were not observed during the involution of the bursa.     

Estudio Histoquímico de las Fibras Musculares de Algunos Teleósteos Marinos y de Agua Dulce

Histochemical and morphological studies of skeletal muscle of some fresh and salt water fish is presented. Distribution of three muscle types, red, intermediate and white, is discussed.     

Distribución de las arterias coronarias del toro de lidia

This study describes the left and right coronary artery distribution in the Spanish fighting bull, and compares the findings of the investigation with those of other bovine species in which similar investigations have been carried out. It is concluded that the general distribution of the coronary system in the Spanish fighting bull is similar to that of other bovine species which have been studied.     

Interet de l'examen d'un etalement de sang pour le diagnostic et le pronostic de l'hemobartonellose feline a propos de 23 cas observes dans la region Toulousaine

Feline Haemobartonellosis was until 1975, a rare disease in the territorial region of Toulouse. Based upon 23 actual cases (20 of which were observed in 1976 and 1977) and 3 experimental inoculations, the author emphasises the interest of practising a blood examination to assist in determining a diagnosis and prognosis of the disease.The diagnosis of the disease cannot be established unless one can confirm the simultaneous presence of a hyperhemolysis with the presence of H. felis in the blood smear.Even though the infestation of the parasite is not permanent, morphological modifications of the red blood cells and of the mononuclear white blood cells as well as inversion of the leucocytic blood value are additional elements for a strong suspicion of the disease.A massive infestation of the parasite at the time of the diagnosis is not necessarily an unfavorable element. An important lymphocytic reaction, however, is considered to be a good sign.The prognosis depends upon the treatment and also upon whether there is concurrent disease.To correctly perform comparative therapeutic trials, the blood smear will again be of great utility.     

Mecanismos de Desarrollo de la Cúpula en los Conductos Semicirculares de las Aves: II. Reorganizacion Celular

A light microscopic study of the epithelia of the crista ampullaris of the semicircular canals of the embryonic chicken indicates that the epithelial cells undergo irregular degenerative changes, with continual mitotic replacement of surface cells. The cupula develops over the surface epithelia through vesicular secretions containing acidophils fibrillar material mixed with globular formations derived from fragmentation of the surface epithelial cells. Electron microscopic studies demonstrate the mode of secretion of rounded or oval supraepithelial bodies from surface epithelium, contributing to the development of the cupula ampullaris. These observations provide evidence of cytoplasmic contributions of surface epithelial cells of the crista ampullaris contributing to the development and continued reorganization of the cupula ampullaris during embryonic development.     

奶牛de护蹄

1奶牛护蹄的重要性发展奶牛业,要靠科学的饲养管理方法。牛的护蹄是一项重要的管理技术。现在,有些饲养户对护蹄工作缺乏科学的技术指导,更重要地是忽视蹄的护理,造成蹄病和蹄的变形,导致繁殖性能下降,产奶量降低。调查研究指出,奶牛蹄病和变形蹄发病率都很高,北京市对1070头成年黑白花奶牛调查,其中,变形蹄有589头,占总数的55.05%,因变形蹄而被淘汰的牛占22.6%。据印度报道,在农场617头奶牛和363头延蹄牛中,取50头牛进行削蹄,削蹄后产奶量增加3.8%。据前苏联报道,对变形蹄牛削蹄后产奶量增加5.1%～7.1%。2如何护蹄2.1蹄的卫生牛蹄负担体重…     

Diagnostic de la rage sur culture cellulaire Comparaison des resultats de l'inoculation au neuroblastome murin et de l'inoculation a la souris

Mouse inoculation test (MIT) is a highly sensitive test for rabies diagnosis but slow and expensive. To detect rabies virus an in vitro technique using Neuro 2a cell culture (CC) was compared with MIT in two laboratories.

In one laboratory, CC appeared to be on the whole more sensitive than MIT, nevertheless MIT was the only one to detect some positive samples. In the other laboratory, MIT was more sensitive. These results justify the use of CC for epidemiological diagnosis but emphasize the interest of MIT (the reference technique) for special cases.