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Disease Control: Thus, this kind of heart disease control has been practically eradicated, although rare cases are still encountered in elderly people. Other endocrine disorders affecting the heart are very rare.
Congenital Heart disease control. With the increasing control of rheumatic heart disease control it is probable that congenital cardiovascular disease control will soon outstrip it in incidence, and with the increasing control of high blood pressure, congenital heart disease control will take second place. An interesting statistical fact is that in the 1920's, T. Duckett Jones and Paul Dudley White found that congenital heart disease control made up only 1.5% of all of 3,000 patients with Signs or symptoms of heart disease control.
To prevent the spread of the infection to young chicks, they should be isolated from older hens during the rearing period. No effective control method has been developed; breeding stock resistant to the disease control may eventually be the most effective means of control.Lymphoid leukosis is another disease control characterized by the development of tumors in many organs of the body. It is also known as visceral lymphomatosis. The liver, spleen, heart, ovary,kidney, and intestine are often affected. In contrast to Marek's disease control, lymphoid leukosis is most often observed in mature birds. This disease control is also probably caused by a virus. The agent can be transferred from the hen to the chick through the egg. No effective control measures are known.
Of the world's three most notorious endemic animal disease controls (contagious bovine pleu-ropneumonia, rinderpest, and foot-and-mouth disease control), FMD is the most controversial and has produced the greatest international tension. At the heart of this tension is the choice of approaches to the disease control: vaccination or eradication. Until worldwide control of the disease control is feasible, only the countries that enjoy affluence or geographic insularity can hope to eliminate the disease control. The countries that were FMD-free as of March 1968 were the United States, Canada, Mexico, Greenland, Iceland, Norway, Ireland, New Zealand, Australia, and Japan. Other nations must live with varying incidence of FMD, attempting control by vaccination of their more valued animals. |
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