Growth and carcass attributes of growing Creole kids according to experimental infection level and type of diet

Abstract

In the tropics one of the major constraints to goat production is infection by gastrointestinal nematodes (GIN). One promising alternative to chemotherapy is the improvement of host nutrition. The aim of this study was to assess the effects of infection and supplementation on packed cell volume (PCV), average daily gain (ADG) and carcass quality in growing Creole kids. Sixty male goats were reared indoors following a 2 × 3 factorial design: two experimental infection levels, (infected (I) and non-infected (NI)) and three diets D (G, kids were fed exclusively with tropical forages; B, kids were supplemented with dried and crushed banana and C, kids were supplemented with commercial pellets). Faecal egg counts did not vary among I groups (on average 2,200 ω/g). The PCV and ADG were improved (P < 0.001) for NI vs. I animals. There was a D effect (P < 0.001) and no I × D interaction was observed. There was no significant effect of GIN on the main carcass data, except the weights of liver, white offal and abdominal fat, which increased slightly in I compared with NI goats (P < 0.05). All carcass data increased significantly with the addition of supplement in the diet (P < 0.001), except for carcass-cut proportions. Meat physical parameters were degraded when I kids received low N diets (B or G) with higher lightness and water loss than in the C groups. Given that GIN affect the animal's N metabolism it is recommended to avoid the use of unbalanced diet such as those banana-based. Further research is necessary to assess the nutrition × parasitism interactions on physiological features and carcass quality of Creole goats.

Mixed Grazing and Dietary Supplementation Improve the Response to Gastrointestinal Nematode Parasitism and Production Performances of Goats

“…Indeed, although kids of the Control groups showed the same level of parasitism measured through FEC, the supplementation improved significantly the production performances (i.e., BCS, LW, and carcass traits) of kids in this group. This effect of the dietary supplementation was also observed previously in studies showing up to 60% of reduction in the anemia induced by H. contortus infection in kids (30)(31)(32). These results suggest a close interaction between dietary supplementation and the level of parasitism.…”

Feeding Fungal-Pretreated Corn Straw Improves Health and Meat Quality of Lambs Infected with Gastrointestinal Nematodes

“…Some studies have attempted to improve meat quality of GIN-infected sheep by increasing dietary protein to mount a strong immunity associates to GINs. For example, feeding bananas without any additional protein resulted in infected lamb’s meat with lower b * and L * value and higher a * value compared to dietary protein supplementation [ 27 ]. Furthermore, supplemental dietary protein decreased L * values and increased a * values of lamb meat [ 3 ].…”