Rumen Of Goats Research Articles

反芻胃の消化に関する研究

Following the previous report, the experiments on the artificial culture of Infusoria from goat's rumen have been undertaken. The life span of Infusoria including Entodinia mainly, studied here, can be extended for about twenty days in vitro by addition of fresh white clover leaves at an amount of 5_??_6%; to the hay-RINGER'S extract culture medium. which is inoculated with rumen bacteria and incubated for 3 days. It is observed that Infusoria are inan actively motile state and have frequent fission. Infusoria can not survive at various concentrations of the clover juice in the absence of the other essential factors. These effects of fresh white clover leaves on Infusoria cultures are not due to their inorganic substances. When the fresh clover leaves are heated at 100° for 30 minutes, they do not forfeit their properties. So, it may be assumed that the effetcive factor of the clover leaves is a thermostable one. The same effective factor also exists in green peas and spinach leaves.

The incidence ofStreptococcus bovisin cattle

1. The numbers ofStreptococcus bovisin the rumen of a heifer and a steer, each having a permanent rumen fistula, were shown to remain relatively constant within the range 105to 107per ml. rumen liquid (strained rumen contents) over a period of more than 3 years.2. The numbers ofStrep. boviswere little affected by the change in diet from stall-feeding (oats, beans, hay and straw) to grass or vice versa.3. There was a slight increase in the numbers ofStrep. bovisfollowing each meal when the animals were stall-fed, but no appreciable variation in numbers throughout the day when the animals were at grass.4.Strep. bovishas also been isolated from the rumen of freshly slaughtered cattle and sheep from different parts of the country, from the rumen of goats and calves and from the faeces of cattle, goats and in small numbers associated withStrep. equinusfrom horse dung.5.Strep. boviswas found in the contents of the omasum, large intestine and caecum of three cattle, but in the small intestine of only one of these animals. Very small numbers ofStrep. boviswere detected in the abomasal contents of only four of twelve animals examined.6. The characteristics of these strains ofStrep. bovishave been described. The synthesis of an iodophilic polysaccharide byStrep. bovishas been demonstrated.7. A possible role ofStrep. bovisin the decomposition of starch and other carbohydrates in the rumen is discussed.

山羊の第一胃第二胃の運動機構について

山羊の第一胃第二胃の運動機構について