Stenurus

Stenurus is a genus of parasitic nematodes belonging to the family Metastrongylidae. These worms are primarily found in marine mammals, specifically cetaceans (whales, dolphins, and porpoises). They reside within the circulatory system, commonly inhabiting the renal veins, pulmonary arteries, and occasionally the brain or other tissues of their hosts.

Stenurus species are known to cause various pathological effects in infected animals, including inflammation of the blood vessels (vasculitis), thrombosis, and potential damage to the central nervous system if the worms migrate to the brain. The severity of the infection can vary depending on the species of Stenurus, the location of the worms within the host, and the overall health of the infected animal.

Identification of Stenurus species often relies on morphological characteristics, particularly the structure of the male bursa and spicules. Diagnostic techniques may include necropsy examination to recover and identify the worms, as well as microscopic examination of tissues to detect the presence of larvae or other signs of infection.

Further research is ongoing to better understand the life cycle, host-parasite interactions, and impacts of Stenurus infections on cetacean populations. The prevalence and distribution of these parasites can provide valuable insights into the health and ecology of marine mammal populations.