The objectives of the study were: (a) assessment of efficacy of coccidiostats against caecal intestinal coccidiosis; (b) studies on the effect of medication with the coccidiostats on the development of immunity; (c) studies on drug-resistance, if any, in field isolates of poultry coccidia; (d) characterization of lesions due to various species of coccidia; and (e) studies on the role of litter on coccidiosis and helminthiasis. The study revealed that 71.5% of 156 coccidial isolates made from the field were resistant to Sulphaquimoxaline, 58.8% to Bifuran and 34.1% to Amprolium. The use of these drugs would not control Coccidiosis on poultry farm in most cases. It is recommended that these drugs be replaced by newer broad-spectrum anticoccidial drugs; e.g. Coyden, Nicarbazin, Pancoxin, Amprolplus, Duocoxin, & Saquadil.
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