What parasitic or symbiotic organisms may be found inside and outside the crayfish?

What parasitic or symbiotic organisms may be found inside and outside the crayfish?

There are many well-known parasite scientists at home and abroad or people interested in crayfish parasites, who have carried out extensive research on crayfish parasites, and a large number of research reports have been published. Crayfish epizoan parasites include helminths such as remodeling (trematodes), tapeworms (tapeworms), nematodes (roundworms) and echinococcosis (neoepines). Most parasitic offspring do not have much effect on the health of crayfish unless a large number of parasitists lead to dysfunction of the crayfish organs. However, some parasites may have no effect on the health of crayfish, but may have an effect on human health. For example, some species of the genus Conjunctivozoa, which are common in crayfish, can cause severe lung infections in humans. People who have a habit of eating crayfish raw in Asia have the potential to become infected and breed trematodes. Therefore, cases of parasitic diseases due to eating raw crayfish are relatively common in this area. These parasites can be killed by heating or cooking properly, so heating or cooking the crayfish properly before eating them is beneficial to the health of crayfish consumers.

Planarian head cutters, link animals and several arthropods are well-known symbiotics of crayfish. Although the attachment of these organisms rarely causes diseases in crayfish, when the quality of the culture water deteriorates seriously, the large number of attachments of these organisms may lead to the normal physiological condition of the crayfish being affected and the disease occurs, which is also because the number of parasites attached to the surface of the crayfish or parasitizing in their bodies will increase significantly when the quality of the cultured water deteriorates.

The eggs have a hard shell, like the egg cocoons of leeches, and if they are attached to the surface of the crayfish in large quantities, there are also safety and health problems for consumers.

Recently, as more and more crayfish continue to spread to new areas, scientists are paying close attention to new ecological problems in the parasitizing crayfish or the various offspring animals that live with them.