Evaluation of Body Weight Lines of Divergently Selected Broiler Chicken Types in a Hot-Humid Tropical Environment of Umudike, South-Eastern Nigeria

This study was conducted to evaluate the production performance of high and low body weight lines of divergently selected crossbred normal feather (NF), naked neck (Na) and frizzle (F) indigenous broiler chickens raised in a hot-humid environment of Umudike, South-eastern Nigeria. Results showed that targeted 6 weeks body weight in the two body weight lines were significantly (p>0.05) different, with the heavy normal feather (ExHNF) and heavy frizzle (ExHF) individuals recording the highest body weight (1512.10 and 1508.30 g), respectively. Average daily feed intake (ADFI) and feed conversion ratio (FCR) were also better in these heavy weight lines. The linear body measurements (LBMs) namely, body length (BL), keel length (KL) and shank length (SL) were significantly higher in the heavy body weight, when compared with the low body weight lines. It was evident from the study that the genetic background of the selected lines influenced the performance of the progenies, with each line resembling its dam of origin

Maternal malaria status and metabolic profiles in pregnancy and in cord blood: Relationships with birth size in Nigerian infants

BACKGROUND: Malaria is more common in pregnant than in non-pregnant Nigerian women, and is associated with small birth size and the attendant short- and long-term health risks. The influence of malaria on maternal metabolic status in pregnancy and in cord blood and how this relates to birth size has not been studied. The study objective was to define relationships between maternal and cord serum metabolic markers, maternal malaria status and birth size. METHODS: During pregnancy, anthropometric measurements, blood film for malaria parasites and assays for lipids, glucose, insulin and TNF were obtained from 467 mothers and these analytes and insulin-like growth factor-I (IGF-I) were obtained from cord blood of 187 babies. RESULTS: Overall prevalence of maternal malaria was 52%, associated with younger age, anaemia and smaller infant birth size. Mothers with malaria had significantly lower cholesterol (total, HDL and LDL) and higher TNF, but no difference in triglyceride. In contrast, there was no effect of maternal malaria on cord blood lipids, but the median (range) cord IGF-I was significantly lower in babies whose mothers had malaria: 60.4 (24,145)μg/L, versus no malaria: 76.5 (24, 150)μg/L, p = 0.03. On regression analysis, the key determinants of birth weight included maternal total cholesterol, malarial status and cord insulin and IGF-I. CONCLUSIONS: Malaria in pregnancy was common and associated with reduced birth size, lower maternal lipids and higher TNF. In the setting of endemic malaria, maternal total cholesterol during pregnancy and cord blood insulin and IGF-I levels are potential biomarkers of foetal growth and birth size