Strongylida

Strongylida is an order of parasitic worms that belong to the phylum Nematoda. They are commonly known as roundworms or nematodes. The order Strongylida includes several families of parasitic worms that are significant in human and veterinary medicine.

Taxonomy

The order Strongylida is divided into several families, including Ancylostomatidae, Strongylidae, and Trichostrongylidae. Each family contains several genera and species of parasitic worms.

Morphology

Members of the order Strongylida are characterized by their cylindrical body shape, which is tapered at both ends. They have a well-developed mouth with three lips, and a muscular esophagus. The male worms have a copulatory bursa at the posterior end, which is used for holding the female during mating.

Life Cycle

The life cycle of Strongylida worms involves several stages, including egg, larva, and adult. The eggs are passed in the feces of the host. Under favorable conditions, the eggs hatch into larvae, which undergo several molts before becoming infective. The infective larvae can penetrate the skin or be ingested by the host. Once inside the host, the larvae migrate to the intestines, where they mature into adults and reproduce.

Pathogenicity

Strongylida worms are significant pathogens in humans and animals. They cause diseases such as hookworm disease, strongyloidiasis, and trichostrongyliasis. These diseases are characterized by gastrointestinal symptoms such as diarrhea, abdominal pain, and weight loss. In severe cases, they can cause anemia and malnutrition.

Control and Prevention

Control and prevention of Strongylida infections involve a combination of strategies, including regular deworming of animals, proper sanitation, and public health education. Antiparasitic drugs such as ivermectin and albendazole are commonly used for treatment.

See Also

• Nematoda
• Parasitic worms
• Hookworm disease
• Strongyloidiasis
• Trichostrongyliasis