Fish Disease Diagnosis
Fish Disease Treatments
Ponds, Aquaria & Filtration

Do minnows and mosquitofish carry diseases?

Yes, they do. Wild caught minnows, gizzard shad from the fishing trip, and topminnows, as well as the mosquitofish can be a reservoir for NUMEROUS parasites, and bacterial pathogens, and because their biology has coexisted with these pathogens for millennia, they might not show any symptoms. In other words, it's COMMON for these parasites to live on the fish without causing them obvious harm. They should be considered infectious to the extreme.
"Koi Health & Disease" by Dr. Erik Johnson DVM is 200+ pages from Fish Health Practice - Readable by Beginners and delivered overnight from Amazon.com

Fish disease problems? Need some help? The help pages take you through the basics of the 'fish health work-up' diagnosis method and basic fish disease treatment methods.

90% of all health problems and fish deaths are caused by poor fish keeping! The key pages are essential reading for all beginners and intermediates who are serious about disease prevention.
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What if you could just get "Here's what to treat with." and no advice or education?

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Expanded Content by Dr. Erik Johnson, DrJohnson.com and Used with Permission; Frank Prince-Iles ©2009 All Rights Reserved