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 NematodesThey are unsegmented worms. They are elongated … 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 PositionPhylum: NematodaClass: ChromadoreaOrder: RhabditidaFamily: OxyuridaeGenus: EnterobiusSpecies: Enterobius vermicularisMorphologyIt … Read more

Ascaris lumbricoides: Roundworm

The worm is known as roundworm. It is present all over the world where environmental hygiene is low. The adult worm lives in the lumen of small intestine of human. About 807 million to 1.2 billion people are infected with Ascaris lumbricoides throughout the world. Among them, 10 percent people is infected in the developing … Read more

Taenia solium: Morphology, Life Cycle and Pathogenesis

Taenia solium is also called the pork tapeworm. It is the parasitic organism under phylum Platyhelminthes.  It is found all over the world. It is the endoparasite and adult worm lives in small intestate of man who eat pork.   Systematic PositionPhylum: PlatyhelminthesClass: CestodaOrder:  CyclophyllideaFamily: TaeniidaeGenus: TaeniaSpecies: Taenia soliumDefinitive Host: Human. Adult and larval forms are … Read more