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The major helminth parasites found in wild, semi-wild and golden Sovereign stock guinea fowl were Heterakis gallinarum, Ascaridia galli, Capillaria caudinflata, Raillietina tetragona and R. echinobothrida, while Eimeria species was the most important gastro-intestinal protozoan parasite. The incidence of the latter was higher in the semi-wild stock than in the wild stock. Necropsy of dead guinea-fowl indicated that A. galli, H. gallinarum and Eimeria species were indeed responsible for their deaths, especially in the young birds. Parasites found in blood smears were Leucocytozoon sp., Plasmodium sp. and Aegyptianella pullorum. The only tick found, Argas persicus, was on a few semi-wild stock, while lice of genus Damalinia were found only on wild birds.

Spermiogenesis and cellular associations in the seminiferous epithelium of the guinea fowl were studied and described in "sexually" active adult birds. PAS stain was found to be useful in the recognition of steps of spermatid differentiation only in the first early stages. Nuclear morphological changes were subsequently found to be more reliable in tracing steps of spermiogenesis. It was observed that haematoxylin-eosin stained tissue can be used in the study of spermiogenesis in the bird. Various stages of the seminiferous epithelium were observed in any cross-section of the seminiferous tubules. Distinct cellular associations were observed, but intermix of adjacent germ cells or heterogenous cellular associations were frequently encountered.

The epididymal region of the guinea-fowl was studied in sexually mature birds. The structure of the epididymal region was generally similar to that already described for the domestic fowl, turkey and Japanese quail. Well formed, intratesticular tubuli recti was seen connecting the seminiferous tubules with the rete testis. The latter consists of both intracapsular and extracapsular portions. Six main cell types were recognised in the region: the rete testis was lined by squamous cells, the proximal efferent ductules by ciliated and non-ciliated Type I cells, the distal efferent ductule by ciliated and non-ciliated Type II cells, and the connecting ductules, ductus epididymidis and ductus deferens were lined by non-ciliated Type III and basal cells. The cell classification adopted in this study is discussed.