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Eschericia coli bacteriophages were isolated from the intestines of chickens. These phages had different lytic patterns, and were propagated in nutrient broth containing 0.4 gm calcium chloride/litre. The agar layer technique was used to determine the routine test dilution (RTD) and plaque morphology. The phages differed in their 1) morphology, 2) RTD(More)
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