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Baytril Injections


As stated in previous articles, the most effective way to treat a bacterial infection is to inject the Koi with antibiotics. This gets the proper amount of medication directly into the koi. There are various ways to sedate a Koi or to keep the Koi immobile to inject it, but the techniques warrant a separate article. The various ways to inject a Koi are described here.

Baytril is a synthetic antibiotic and while being a broad spectrum antibiotic it does not kill directly nor stun bacteria. It inhibits an enzyme which is important for bacterial replication. Enrofloxacin (Baytril) is widely used in ornamental fish although there is very little pharmacokinetic information. It is especially effective against gram negative bacteria.

As a rule, my first choice antibiotic to treat ulcers is Baytril. The reason for this is that Baytril is a relative safe drug with a long shelf life. Baytril is also very easy to inject with a diabetic syringe, limiting the damage to the fish. Unfortunately there are instances where one will encounter bacteria that are resistant to the effects of Baytril. When that happens, there is always the possibility of changing the treatment.

Baytril comes in solutions of 2.27%, 5% and 10%. The safest solution to use in my view is the 2.27% solution and if it cannot be sourced, the 5% solution is second. I have found that especially in smaller fish, if one uses the 10% solution, permanent damage may occur to the muscle where the injection took place. If the stronger 10% solution must be used, the best site to inject is in the intraperitoneal cavity.

The recommended dosage of Baytril should be injected three times, once every three days. Studies have shown that the effects of Baytril remains in the blood for up to 100 hours which means we can repeat injections every 3 to 4 days rather than the traditional every day for three days then every other day for two more.


Note on the use of Baytril:

There are instances where a fish may develop a non-contagious cyst at the injection site. This will normally clear in two weeks.


Last Updated on Wednesday, 29 February 2012 12:47