Leishmania donovani: Morphology, Life Cycle, Leishmaniasis and Its Prevention

The genus Leishmania is a protozoan parasite which belongs to the family Trypanosomatidae under the phylum Euglenozoa. It is an obligate parasite which requires a host for completing their life cycle. It is responsible for the disease, known as leishmaniasis.  Over 50 species belong to genus Leishmania were described worldwide; among them about 20 species … Read more

Giardia duodenalis: Morphology, Life Cycle, Pathogenesis

Giardia duodenalis (Giardia intestinalis/ Giardia lamblia) is a flagellated parasitic microorganism. It is the only pathogenic protozoan found in the duodenum and jejunum of humans. It is the cause of disease, known as giardiasis which is actually infection of the small intestine. It is found throughout the world. Giardiasis is the most common water-borne, parasitic … Read more

Wuchereria bancrofti: Morphology, Life Cycle and Pathogenesis

Wuchereria bancrofti is a filarial nematode worm. Adult Wuchereria bancrofti lives in lymphatic vessels and lymph nodes of human and cause lymphatic filariasis. It causes diseases together with Brugia malayi and B. timori.  Various mosquitoes are responsible to spread the filarial worms. It affects over 120 million people throughout the world. If infected people do … Read more

Strongyloides stercoralis: Morphology, Life Cycle and Pathogenesis

Strongyloides stercoralis is a nematode parasite which belongs to the family Strongylidae under order Rhabditida. It is a human pathogenic parasite which causes disease, known as strongyloidiasis. The parasite is also known as threadworm causing infection with fecal contamination of soil or water.  It is rare in developed countries while in the developing countries, it … Read more

Nematodes: Characteristics and Classification

The nematodes are also known as roundworms. They belong to the phylum Nematoda. They are a diverse group of animal organisms found in a broad range of environment. Some are free living in soil, marine and freshwater; some make parasitic life in animals and plants body. General Characteristics of Nematodes They are unsegmented worms. They … Read more

Enterobius vermicularis: Morphology, Life Cycle and Pathogenesis

Enterobius vermicularis is commonly known as threadworm and pinworm. It is found all over the world. Infection of Enterobius vermicularis in human is known as enterobiasis. It is worldwide in distribution. Particularly, it is common in children.  Generally, the mature females live in the vermiform appendix and caecum. Systematic Position Phylum: Nematoda Class: Chromadorea Order: … Read more