We were taught about catching fish TB in my vet nursing course briefly.
Think from drinking siphoned water too, not only from cuts on hands.
Sorry, this is extreme, but I never knew possible before, just something for folks to be careful about.
http
/www.aquaticcommunity.com/disease/tbc.php.
Sorry my link isn't working
Fish tuberculosis and the aquarist
Prevention
When aquarists become infected by Mycobacterium marinum, it is usually because the carry out maintenance work when they have cuts or other skin problems on their hands or arms. Our skin is remarkably good at keeping malevolent microorganisms out, but as soon as the skin gets injured, an important part of the body’s defense system has been breached. It doesn’t have to bee a large wound; a simple paper cut or eczema can be enough for Mycobacterium marinum to slip through. When handling an aquarium where you suspect that Mycobacterium marinum may be present, it is consequently important to use protective gloves. You may have a tiny sore that you haven’t even noticed, such as a torn cuticle. Some aquarists prefer to use gloves all the time, or at least when they have damaged skin, since it is impossible to know if Mycobacterium marinum exists in an aquarium before the fish start to show symptoms of fish tuberculosis. You can also catch fish tuberculosis by using your mouth to start a siphon. Washing your hands and lower arms with soap after handling fish and aquariums is naturally always recommended.
Symptoms and treatment
When aquarists become infected with fish tuberculosis, it normally starts as a skin problem. Mycobacterium marinum is a slow growing mycobacterium and it can therefore take several weeks before you notice any symptoms. The first sign is normally small purple lesions or “bumps”. The lesions will grow and spread and Mycobacterium marinum can proceed to destroy the soft tissue under the skin, including tendons and joints. In severe cases, fish tuberculosis can spread to the bones and cause symptoms similar to arthritis.
Most doctors never come in contact with fish tuberculosis and if you show up with some strange lesions on your hands, they might not realize what is causing it and put you on a general oral antibiotic that will not kill Mycobacterium marinum. It is therefore very important to inform your doctor that you are an aquarist and that you may have caught fish tuberculosis or some other disease from your aquarium. Mycobacterium marinum can be successfully treated but only if the right combination of drugs are used. Just as with Mycobacterium tuberculosis, the treatment will normally need to be carried out over the course of several months. In serious cases, intravenous administration of antibiotics may be required.