[On Setaria spp; (Nematoda, , Filarioidea, Setariidae) from the peritoneal cavity of equine spp.: two new sub-species, Setaria equina theilerae from wild Zebra of Africa, and Setaria equina dafaallai from horse and donkey of southern Sahara area (author’s transl)].

This research article studies different types of Setaria species (a type of worm) found in the peritoneal cavity of various equine species. The study identifies two new subspecies of the worm: Setaria equina theilerae found in African wild zebras, and Setaria equina dafaallai found in horses and donkeys from the Southern Sahara area.

Study Background and Identification of Worms

• The article centers around the Setaria species of worms known as nematodes, specifically those found in the peritoneal cavity in different equine species such as horses, donkeys, and zebras.
• This study identifies Setaria equina (first described by Abildgaard in 1789) as commonly found in horses and donkeys across Eurasia, America, and North Africa.

New Subspecies Discovery

• The primary focus of the research article is the discovery of two new subspecies of Setaria equina. These freshwater worms which are found in different geographical areas and host animals, are hence named differently.
• Setaria equina theilerae, is the new subspecies discovered in African wild zebras.
• Setaria equina dafaallai is the second subspecies, which has been discovered in horses and donkeys from the Southern Sahara region of Africa, particularly found along the Nile Valley till the Western coast.

Cross Breeding of Subspecies

• The research article also explores the possibility of cross-breeding between S. equina and S. e. theilerae.
• This crossbreeding seems possible because the host species, in certain circumstances, can produce hybrid offspring. Therefore, a similar process can occur in the studied nematodes.

In summary, the research has contributed substantially to the existing knowledge about Setaria species, particularly Setaria equina. It has discovered two new subspecies indigenous to specific geographical regions and has proposed the possibility of cross-breeding, enhancing the understanding of worm speciation and adaptability.