The gonads open near the base of the abdomen and the excretory organs are usually Malpighian tubules.
生殖腺开口于近腹部基部，排泄器官通常为马氏管。
2
The results indicate that the pathogen occurs in the midgut, fat bodies, malpighian tubules and nerve cells of the host.
结果表明：该微孢子虫可侵染棉铃虫的中肠、马氏管、脂肪体、神经等组织；
3
Malassezia can breakdown lipid like esterase, and result in morphological changes of malpighian cell and cell apoptosis, these are all their main etiological factors.