Egg Transmission of Avian Lymphomatosis

Abstract THE PROBLEM OF EGG TRANSMISSION IN THE study of any disease it is important to know the natural modes of transmisssion because such knowledge may lead to useful control or eradication measures. Three main natural modes of transmission for avian lymphomatosis have been suggested: (1) through direct contact of infected with non-infected birds. (2) through indirect contact with the secretions and excretions, blood, etc., of infected birds by means of contaminated equipment, air, feed, caretakers, insects and rodents, and (3) through the egg from infected parents to the offspring (Cottral, 1952b). The hypothesis that lymphomatosis may be transmitted through the egg has neither been proved nor disproved, even though it has been more than 23 years since Doyle (1929) suggested that the disease may be transmitted in this manner. Since then, many workers have presented observations and experimental evidence both for and against this contention. Epiornithological observations on the spread …

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