Changes in the integument of nymphal and adult hyalomma [hyalomma] dromedarii koch[Acari: Ixodoidea: Ixodidae] I the effects of feeding and moulting

The integument of the dorsal alloscutum in nymphal and female H. dromedarii consists of the cuticle underlined by epidermis. The cuticle contains two layers, a thin external epicuticle and a thick internal procuticle. The procuticle is distinguished into an outer endocuticle and an inner endocuticle. Changes occuring in the cuticle and epidermis in symphal and adult H. dromedarii are correlated with moulting and feeding

Changes in the integument of nymphal and adult hyalomma [hyalomma] dromedarii koch[Acari: Ixodoidea: Ixodidae] II the effect of 20-hydroxy ecdysone

The exogenous doze of 20-Hydroxy Ecdysone [20-HE] used in the present study did not accelerate moulting in nymphal Hyalomma dromedarii. However, histological observations exhibit an increase in epidermal cell activity and in the deposition of the endocuticular lamellae