What is the classification of Strongyloides stercoralis?

Strongyloides stercoralis
Threadworm
Phylum:Nematoda
Class:Chromadorea
Order:Rhabditida
Family:Strongylidae

What is the common name of Strongyloides stercoralis?

threadworm, (Strongyloides stercoralis), worm of the phylum Nematoda that is parasitic in the human intestine but is able to live freely and breed in the soil. It is especially common in the moist tropics.

How do you identify Strongyloides stercoralis?

Strongyloidiasis is usually diagnosed by microscopic identification of Strongyloides stercoralis larvae (rhabditiform and occasionally filariform) in the stool, duodenal fluid, and/or biopsy specimens, and possibly sputum in disseminated infections.

What is the morphology of Strongyloides stercoralis?

Morphology. Strongyloides stercoralis: Rhabditiform first stage larva With the Strongyloides species that infect mammals, the parasitic adults are all female. They are very small, up to approximately 2 mm in length, and cannot easily be seen without a microscope.

What is the pathogenesis of Strongyloides stercoralis?

Pathophysiology of Strongyloidiasis

, Strongyloides larvae penetrate human skin, migrate via the bloodstream to the lungs, break through pulmonary capillaries, ascend the respiratory tract, are swallowed, and reach the intestine, where they mature in about 2 weeks.

How many species of Strongyloides are there?

Though there are over 40 species within this genus that can infect birds, reptiles, amphibians, livestock and other primates, Strongyloides stercoralis is the primary species that accounts for human disease.

What is the life cycle of Strongyloides stercoralis?

There are three stages in the life-cycle of Strongyloides stercoralis: free-living, parasitic, and autoinfection. After copulation, the free-living female accumulates eggs in her uterus that contain partially developed larvae. The eggs are laid in the soil where further development occurs.

What are the main reservoir of Strongyloides?

Parasitic males are shorter and broader than females and are easily eliminated from the intestine. Only adult females are found in infected humans. Humans are the principal host of S stercoralis. Dogs, cats, and other mammals can also harbor the worm and may serve as reservoir hosts.

What are the different methods for the identification of the nematodes?

Morphological and Image-Based Analyses

Classic identification of nematodes is based on morphological and anatomical differences using microscopic image analysis. Morphological identification is among the cheaper identification methods and helps relate morphology with possible function [5].

Where is Strongyloides common?

Strongyloides is known to exist on all continents except for Antarctica, but it is most common in the tropics, subtropics, and in warm temperate regions. The global prevalence of Strongyloides infection is unknown, but experts estimate that there are between 30–100 million infected persons worldwide.

What is the common name of Capillaria Philippinensis?

The nematode (roundworm) Capillaria (=Paracapillaria) philippinensis causes human intestinal capillariasis. Unlike C. hepatica, humans are most likely the main definitive host. Transmission occurs primarily through eating undercooked fish.

What is common name of Ancylostoma duodenale?

the Old World hookworm
Ancylostoma duodenale is a species of the roundworm genus Ancylostoma. It is a parasitic nematode worm and commonly known as the Old World hookworm.

Which of the following is the common name for Enterobius vermicularis?

The nematode (roundworm) Enterobius vermicularis is widely known as the human pinworm due to the female’s long, pointed tail. In some areas the common names “seatworm” and “threadworm” are used (the latter of which is sometimes also used to refer to Strongyloides stercoralis).

Why is Capillaria Philippinensis called mystery disease?

Twelve deaths among people coming from the same barangay, affected by a similar illness with no definite diagnosis except “gastroenteritis” were also reported. These prompted health officials to send a team that would investigate the etiology of the disease outbreak labeled as a “Mystery Disease”.

What is the infective stage of C philippinensis?

The complete lifecycle of C. philippinensis involves the passage of unembryonated eggs from the feces of infected definitive hosts. The eggs embryonate in the soil or water and are ingested by an intermediate fish host. The egg hatches in the intestines of the fish and develops into an infective larva.

What are the characteristics of helminths?

The helminths are invertebrates characterized by elongated, flat or round bodies. In medically oriented schemes the flatworms or platyhelminths (platy from the Greek root meaning “flat”) include flukes and tapeworms. Roundworms are nematodes (nemato from the Greek root meaning “thread”).

What species is Capillaria?

Capillariasis is a parasitic disease in humans caused by two different species of capillarids: Capillaria hepatica and Capillaria philippinensis. C. hepatica is transferred through the fecal matter of infected animals and can lead to hepatitis.

What is the intermediate host of Capillaria Philippinensis?

Fish from lagoons in Northern Luzon, Philippines, have been shown experimentally to be intermediate hosts of Capillaria philippinensis. Eggs ingested by the fish hatch in the intestines and the larvae double in size in 3 weeks.

What is the life cycle of Dracunculus Medinensis?

The male worm dies shortly after mating, and the female matures over the subsequent 10–14 months, slowly migrates to the surface of the body and emerges through the skin. When affected body parts are submerged in water, the female worm releases larvae, which are ingested by copepods, thus completing the life cycle.

Is Capillaria an Ascarid?

Occurrence: worldwide on birds reared on reused litter. Ascarids, Capillaria, tape worms are helminths or worms and are very common internal parasites. Species affected: All birds.

What causes Capillaria?

Once accidentally ingested by a human, the eggs migrate to the liver and mature to adult worms. Another route of transmission is through the decomposition of infected animals via eggs in the liver being released into the soil. C. philippinensis is often found in the tissues of small, freshwater fish.

What is Trichuriasis?

Parasites – Trichuriasis (also known as Whipworm Infection) Related Pages. An estimated 604-795 million people in the world are infected with whipworm. Whipworm, hookworm, and Ascaris are known as soil-transmitted helminths (parasitic worms). Together, they account for a major burden of disease worldwide.

What is the largest intestinal nematode?

Structure. Ascaris lumbricoides is the largest and most common intestinal nematode of humans. Females are approximately 30 cm long; sexually mature males are smaller. The diameter varies from 2 to 6 mm.