Wuchereria bancrofti, Brugia malayi and Brugia timori are the causative agents of Lymphatic filariasis (Elephantiasis). Microfilariae of these nematodes show nocturnal periodicity. They appear in peripheral blood at night time between 9 pm and 2 am. This periodicity is due to biological and evolutionary co-adaptation of the microfilariae to the feeding habit of the mosquito […]

Balantidium coli is a protozoan parasite belonging to the phylum Ciliophora, the members of which possess cilia in at least one stage of their life cycles. The ciliophora also have two different types of nuclei, one macronucleus and one or more micronuclei. It has both the trophozoite and cyst forms as part of its life […]

Roundworm passes its life cycle in single host and no intermediate host (the host that harbors larval stage of parasite) is required. Man is the only definitive host (the host in which parasite harbors its adult stage or it utilizes sexual method of reproduction) of A. lumbricoides. The various stages in life cycle are described […]