Effects of avilamycin on performance of broiler chickens.

The benefits of feeding avilamycin (Surmax/Maxus, Elanco Animal Health) to broiler chickens were demonstrated in a floor pen study (two trials) in which avilamycin was fed at 10 ppm in a 45-day growout. Final live weight of broilers fed avilamycin was significantly (P < or = .01) heavier (90 g) than that of control broilers fed for an equal number of days.

In vitro characteristics of myogenic satellite cells derived from the pectoralis major and biceps femoris muscles of the chicken.

Satellite cells were isolated from the pectoralis major (PM) and biceps femoris (BF) muscles of 5-week-old broiler chickens to compare growth and differentiation characteristics in vitro. BF cells proliferated at greater rates in the growth medium and were more responsive to the mitogenic effects of chicken serum than PM cells at all levels tested (p < or = 0.05).

Comparison of growth factor receptors and metabolic characteristics of satellite cells derived from the biceps femoris and pectoralis major muscles of the turkey.

Myogenic satellite cells were isolated from the turkey pectoralis major (PM), a muscle composed largely of white fibers, and the biceps femoris (BF), a muscle composed largely of red fibers, and their properties were compared in culture. Satellite cells derived from the PM and BF muscles exhibited differences in metabolic parameters, growth factor receptor characteristics, and mitogenic responses. PM satellite cells exhibited greater responsiveness to platelet-derived growth factor (PDGF), and the PDGF receptor on these cells had a higher affinity toward ligand compared to BF cells (P < 0.

Response of layer breeders to dietary acetylsalicylic acid. 3. Effects on fertility and hatchability of embryos exposed to control and elevated incubation temperatures.

Because acetylsalicylic acid (ASA, aspirin) is a common antipyretic drug, there has been considerable research on the effects of ASA on mammalian embryonic development. However, very limited research has been conducted on the effects of ASA on avian development and hatchability. The present study investigated the effect of dietary ASA on fertility and hatchability and whether embryos of breeder hens fed ASA, as compared with embryos of hens fed a control diet, would survive elevated temperatures during incubation.