The miscellaneous nematodes are Angiostrongylus costaricensis, anisakiasis, Baylisascaris
procyonis, capillariasis, dirofilariasis, dracunculiasis, and trichostrongyliasis. Man usually acquire
infection by ingesting these eggs via contaminated food or water, which hatch in the small
intestine and release larvae that penetrate intestine and migrate to lungs a few days later. But,
thelaziasis is an Arthropod-born disease by non-blood sucking flies or filthy flies.
With increasing globalization, parasitic infection of the central nervous system (CNS), once
considered a “tropical" infection, is becoming increasingly more prevalent in all parts of the
worldwide. The immunosuppression increases susceptibility to opportunistic parasitic infection.
Although infected individuals may remain asymptomatic for many years, a higher parasite burden
is correlated with greater morbidity and mortality.