Overview of Transmitted Parasites
The process of getting parasites from fish is known as zoonoses. It’s important to be aware of the infections and diseases that can be passed between vertebrate animals and humans via parasites. These parasites generally enter a human by the ingestion of undercooked or raw infected fish. However, freezing or thoroughly cooking the fish before consumption will kill the parasites and prevent humans from obtaining these human pathogenic parasites.
Parasites Transmitted from Fish to Humans
Diphylloborhrium latum is a parasite that lives in the human intestine and produces complications such as anemia and gastro-intestinal problems. Freshwater fish ingest cyclops that had previously ingested coracidium which later develops into procercoid. When a human consumes undercooked fish, the infection is then passed on. Pickling, salting, or smoking is not a safe way to eat fresh fish as the plueroceroid can not be destroyed through these methods. Diagnosis of the stool by a physician can locate the operculted eggs.
Anisakiasis or anisakidosis is a type of nematode disease that humans can acquire from fish. This disease is typically caused by worms in the larval stages and is naturally found in dolphins, whales, sea lion, porpoises, seals, mackerel, squid, cod, herring, salmon, flatfish, and more. The parasite is usually passed onto humans through poor methods of preparation, including raw herring, sushi, or sashimi. The parasites must be removed by a surgeon through endoscopic techniques. Surgical resection may also accompany this procedure due to damaged walls in the stomach.
Dictophyma renalae is a large nematode resulting in pyuria, renal hematuria, and urine retention due to a parasite within the urinary tract system. The infection is caused by the consumption of raw or undercooked fresh water fish, crustacean, or crayfish which contain nematode larvae. Human urine can be examined beneath a microscope to look for the presence of eggs. The only treatment is the removal of the infected kidney. If both of the kidneys are infected with the parasites, the prognosis is grave.
Trematode infections can transmit to a human through nearly 33 species of fish, mollusks, and crustaceans. These very small trematodes reside in the intestine of mammals and birds. The infective stage of trematode is found in a variety of freshwater fish. Eating undercooked or raw marinated is typically reported as the cause of this infection. As these parasites reproduce, complications including inflammation, necrosis, and ulceration can occur. Nanophyetes salmoncoloa is a type of trematode parasite that is commonly found in the intestine of mammals, including dogs.
Getting parasites from fish can be a scary thought to most fish consumers. However, with the proper diagnosis, these parasites can typically be removed without future problems. If you suspect that you may have a parasite transmitted by an infected fish or crustacean, seek medical attention immediately.
• Diseases Transmitted to Humans
• Human Parasites