Research note: Maxiban effects on heat-distressed broiler growth rate and feed efficiency.
One study was conducted utilizing 192 male broilers, at 4 to 7 wk posthatching, to evaluate a narasin-nicarbazin drug combination (Maxiban) for effects on bird growth rate, feed efficiency, and survivability during cycling ambient temperature (24 to 35 C) distress. Maxiban did not impact (P greater than .1) live weight gain, but reduced (P less than .05) gain:feed ratio (unadjusted for mortality), from .29 for controls to .21 as bird survivability declined (P less than .05) from 87.5 to 69.8%. Adjusting feed efficiency by adding the gain of birds dying of heat prostration to that for birds surviving the experiment resulted in feed efficiency for Maxiban-supplemented birds being similar (P = .48) to birds not consuming Maxiban. Under the conditions of the present study, Maxiban increased the mortality rate of male broilers exposed to cycling ambient temperature of 24 to 35 C during 4 to 7 wk posthatching.
Wiernusz
C J
CJ
Animal Science Department, Oklahoma State University, Stillwater 74078.
Teeter
R G
RG
D000818:Animals; D002645:Chickens / Q000254:growth & development*; D003048:Coccidiosis / Q000517:prevention & control / Q000662:veterinary; D003049:Coccidiostats / Q000494:pharmacology / Q000627:therapeutic use*; D004435:Eating / Q000187:drug effects; D006358:Hot Temperature / Q000009:adverse effects; D008297:Male; D009528:Nicarbazin / Q000494:pharmacology / Q000627:therapeutic use*; D011201:Poultry Diseases / Q000188:drug therapy* / Q000517:prevention & control; D011714:Pyrans / Q000494:pharmacology / Q000627:therapeutic use*; D011897:Random Allocation; D013312:Stress, Physiological / Q000188:drug therapy / Q000662:veterinary; D015430:Weight Gain / Q000187:drug effects
D003049:Coccidiostats; D011714:Pyrans; D009528:Nicarbazin; C013612:narasin