| Popis: |
NICARBAZIN effectively controls experimentally induced coccidiosis in chickens. Barber (1955) reported that levels of 0.02, 0.0125, and 0.0075 percent in mash gave protection against both Eimeria tenetta and E. acervulina. The regimen was not accompanied by toxicity or interference with development of immunity. Ott et al. (1955) reported that this drug, when incorporated in the feed of growing chicks at levels of 0.01 and 0.02 percent, did not interfere with normal growth or feed utilization. Likewise, these authors stated that it did not interfere with sexual maturity, egg production, or egg fertility. However, the feeding of the drug to New Hampshire laying hens was reported by these authors to be associated with a change in the color of the egg shells from brown to white and with reduced hatchability. McClary (1955) observed that nicarbazin at 0.0125 percent in the diet of White Rock hens was responsible for changing the color . . . |
