Studies with Brugia pahangi 5. Structure of the cuticle

The structure of the cuticle of third and fourth stage larvae and of adult Brugia pahangi (Nematoda: Filarioidea) was studied by light microscopy and by transmission and scanning electron microscopy. The cuticle of these worms was basically typical of the class Nematoda and consisted of cortical, matrix, and basal layers. Finely spaced annulation grooves were present and their function is discussed. Descriptions of the cuticular ultrastructure of filarial nematodes are meagre. Studies on the cuticle of adult worms are limited to those of Kagei (1960, 1963) on Setaria cervi and Litomosoides carinii and of McLaren and Hockley (personal communication) who examined L. carinii and Dipetalonema vitea

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