Tag De-Hai Xu

The authors conducted a study to evaluate whether treatment of Trichodina-parasitized tilapia with formalin would improve fish survival and reduce F. columnare infection. Tilapia not treated with formalin showed significantly higher mortality than treated fish. 

The bacterium Flavobacterium columnare and parasite Ichthyophthirius multifiliis (Ich) are common pathogens that can cause heavy economic losses for fish culture. The authors conducted a study to evaluate the susceptibility of hybrid tilapia to F. columnare, including fish mortality and bacterial numbers in fish after parasitism by Ich. 

In a study, the authors evaluated the immune responses and host protection of hybrid catfish and channel catfish against the ich parasite (Ichthyophthirius multifiliis). 

The authors used Ichthyophthirius multifiliis (ich) and fluorescent-tagged Edwardsiella ictaluri to examine whether parasites vector bacteria into fish. 

The authors conducted a study to evaluate whether tilapia infected with Gyrodactylus were more susceptible to Streptococcus iniae. The research found that fish with a solo infection of Gyrodactylus or Streptococcus had less than 7 percent total mortality. 

In research on alternatives to formalin treatment to control Ich infestation, the authors performed a study that compared the immune responses of Nile tilapia and red tilapia against the parasite. 

Vaccination against the Ich parasite is an alternative to chemical treatment. Fish develop a humoral immune response to trophont antigens, with the degree of protection related to the immunizing doses of trophonts used.