Last March I picked up about 30 chinchillas for a friend of mine that lives about 2 hours away from me. He hadn't brought in any new chins into his herd in about 15 years and contacted me to see if I could get him some new bloodlines to work with. I contacted 2 other larger breeder's and was able to get what he wanted from them. In August, I received a call from him telling me that he was having some problems with some of his chins and wanted to know if I would come take a look at them to see if I could recognize what was going on. I went to his place a few days later and saw 2 chins with large lumps under their chins and 1 chin with the same large lump back around the genital area that appeared to be abscesses. I also saw at least a handful of chins that had swollen eyes that were very infected with sticky pus or completely swollen shut. He told me he believed the symptoms were related because a couple of the chins that had the swollen eyes had the abscess under the chin previously. I told him I had never seen these symptoms before but, would contact some of my chin friends to see if anyone else had. I started making calls and sending emails and messages out to many of my chinchilla contacts around the US. At first I wasn't having much luck but, then I finally got someone to talk to me and tell me this was a disease that had showed up in some chinchilla herds a few years ago and they were able to point me in the right direction to gather more information from those that had previously dealt with this. I literally spent 2 months researching this disease, talking to as many breeder's as I could that had firsthand information about this disease in chinchillas. I was amazed the more and more information I received about it that I had not even heard about it till now and it had been around for a few years already. I made it very clear to everyone that I talked to that I was not going to mention any names or point any fingers. I was just trying to collect all the good useful information I could from those that have dealt with this disease in order to help my friend treat his herd effectively as well as possibly submitting an article to both Breeder Magazines to help anyone else out there they may encounter this in their herds.
As for the information I've gathered to this point, 3 different breeders had this tested at University labs and all 3 got the same findings that this is a Streptococcus Bacteria similar to what is commonly seen in horses. It is a very contagious bacteria most commonly spread through saliva animal to animal, can also be spread from human to animal very easily after handling an infected chin and then handling another chin. It can become airborne but, can not travel far as an airborne bacteria so only chins in very close proximity could possibly contract from airborne bacteria. It often starts with a itchy wet irritated eye that just wont seem to get better. Some chins will then develop cysts that will abscess and fill with pus most commonly from the lymph nodes under the chin but, can actually show up anywhere on the body. Not every infected animal will develop the abscesses but, when the abscess is drained the pus is highly contagious and the bacteria can live in the pus for up to 2 months. Often the eyes will continue to worsen becoming swollen shut with a sticky pus, this is also a highly contagious state for spreading the bacteria. Infected animals can carry the bacteria in their saliva which can live for up to 2 weeks on anything the animal puts its mouth on. When any of these symptoms are present, the animal is contagious. It is also believed by many that some animals that have been exposed to the bacteria that never actually show any of the symptoms may be carriers of the bacteria and may be able to infect other animals. This is based on the information confirmed with horses and this type of bacteria but, has not actually been proven true in chinchillas to my knowledge.
I have spoken with 3 different Veterinarians regarding this bacteria in chinchillas (2 of which raised chinchillas) and they all agreed that the symptoms chinchillas show are very similar to that in horses with strep equi. They all 3 agreed that a vaccination for this bacteria would not be practical in chinchillas and recommended treating with Sulfadimethoxine in the water mixed 3/4 ounce to 1 Gal water treating all the animals in herd for 5 days, then 5 days of just water, then 5 more days of Sulfadimethoxine in the water. This will treat the animals only. They also all agreed that the cages need to be disinfected during this time to prevent reinfection of the bacteria leftover in saliva on the cage, feeder, or waterer. This regimen has been proven effective in treating this bacteria in 2 different chinchilla herds that have had it.
This disease does not typically kill the chinchillas. Most of the infected chins will improve and heal and go back to normal with treatment. Some have stated they believe once an animal has had the symptoms and gotten better, that they are immune to it reoccurring. I can not confirm that, though I did here it from more than one person. There were only a couple of reported cases where a tumor growth with pus in it grew internally and actually killed the chin from this disease. Most of the time this bacteria is not life threatening to chinchillas. It has also been reported that it may cause sterility in some of the infected chins. I have not encountered any proof of this from those that I've talked to in fact my friend has told me that since he has treated his herd that 2 of the females that were infected have littered and are raising the babies fine and 2 males that were infected have produced breeding plugs recently with their females.
This is a serious disease that no one should ever take lightly. It is very difficult to control when it gets into a herd of chinchillas. It is not just in one area of the country. It has affected several chinchilla herds in many different states already. I would not put it in a epidemic category yet but, it has affected a few fairly large scale breeder's. It is possible to get under control with diligent treatment of animals and disinfecting entire environment and strong husbandry.
In light of all this information I was able to gather on this disease as well as the other health issues that have been being discussed about chinchillas lately, I contacted ECBC and recommended changes be made to the show rules requiring all chinchillas to be visually inspected by a experienced person appointed by the show chairman upon arrival at all the upcoming shows before animals are allowed to be entered and caged at the show. Any chin showing any abnormality, wet eye, runny nose, lump anywhere will not be allowed in the show room. My suggestions were well received and I was told ECBC would attempt to have these rules implemented soon. No one wants to bring anything like this home from attending a show and even though this rule isn't a catch all, it at least is a measure that can be taken to help prevent a sick animal being entered into a show.