Trichostrongyloidea

Trichostrongyloidea

L3 stage larva of C. oncophora

Trichostrongyloidea is a superfamily of parasitic nematodes that primarily infect the gastrointestinal tract of vertebrates, including livestock and wildlife. These nematodes are of significant veterinary importance due to their impact on animal health and productivity.

Taxonomy

The superfamily Trichostrongyloidea belongs to the order Strongylida. It includes several families, such as:

• Trichostrongylidae
• Haemonchidae
• Molineidae

Each family contains numerous genera and species that are adapted to specific hosts and environments.

Life Cycle

The life cycle of Trichostrongyloidea nematodes typically involves direct transmission from host to host. The eggs are passed in the feces of the infected host and develop into infective third-stage larvae (L3) in the environment. These larvae are then ingested by a new host, where they mature into adults in the gastrointestinal tract.

Pathogenesis

Trichostrongyloidea infections can cause a range of clinical signs in infected animals, including diarrhea, weight loss, and reduced growth rates. The severity of the disease depends on factors such as the species of nematode, the host's immune status, and the level of infection.

Control and Treatment

Control of Trichostrongyloidea infections involves a combination of anthelmintic treatments and management practices to reduce exposure to infective larvae. Rotational grazing and strategic deworming are commonly used strategies.

Related Pages

• Nematode
• Parasitology
• Veterinary medicine

References

• Anderson, R. C. (2000). Nematode Parasites of Vertebrates: Their Development and Transmission. CABI Publishing.
• Gasser, R. B., & Newton, S. E. (2000). Genomic and genetic research on bursate nematodes: significance, implications and prospects. International Journal for Parasitology, 30(4), 509-534.

Trichostrongyloidea

• 
  L3 stage larva of C. oncophora. Courtesy of Russel Avramenko