Effect of season and genotype on haematological profile and parasitic susceptibility of two Nigerian goat breeds and their reciprocal crosses
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Date
2016
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Nasarawa State University, Keffi
Abstract
Parasitic susceptibility and hematological profile of 192 goats belonging to four genotypes (RSxRS, WADxWAD, WADxRS and
RSxWAD) were assessed during wet and dry seasons of Sudan savannah zone of Nigeria. The goats were produced from the
pure-breeding and reciprocal crossing of Red Sokoto (RS) and West African Dwarf (WAD) breeds. Packed Cell Volume (PCV),
Hemoglobin (Hb) concentration and White Blood Cell (WBC) count were analyzed from blood samples taken from the goats.
Fecal Egg Count (FEC) and Tick counts were obtained from fecal samples and skin examination (respectively). The data
obtained were subjected to Analysis of Variance using 2x4 factorial arrangements in a completely randomized design. There
were significant (P<0.05) interactions between genotype and season in all the parameters except FEC. The crossbred goats (i.e.
RSxWAD and WADxRS) had significantly higher Hb than the purebreds. RSxRS had the highest WBC (11.76c/mm3x103) in the
dry season, and highest ticks infestation (4.80 ticks/head) in the wet season, which were significantly (P<0.05)higher than the
WBC and ticks infestation of other genotypes. Significantly (P<0.05) higher level of ticks infestation was observed in the wet
season than the dry season among the four genotypes, except WADxWAD. Hb concentration and PCV were significantly
(P<0.05) higher in the dry season than the wet season in all the genotypes, except in WADxWAD. It is therefore concluded that
hematological indices and parasitic susceptibility of goat are influenced by season and genotype. Crossbreeding and adequate
management measures toward reducing parasitic infestations are therefore recommended
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Keywords
Faecal sample, Genotype, Hematology, Season, Tick infestation