Diseases in Bats- What’s really going on in Northern California

Diseases in Bats- What’s really going on in Northern California

 While bats  are renowned for their ecological contributions, It is no secret that many people carry a healthy fear of bats in the house.  Not just the bats themselves, but the possible diseases related to bats and there urine and feces in the attic and walls. Yet, they also harbor various diseases that can pose risks to both humans and other animals. In this article, we delve into three significant diseases associated with bats, shedding light on their prevalence, impact, and preventative measures.

Largely, the general rates of diseases in bat populations in California are relatively low compare to other areas of the country.

Please remember this article is for general information, while we may be bat removal professionals, if you specifically have a concern related to a situation you are dealing with, talk it over with a real medical professional.

1. Rabies: A Rare Yet Lethal Threat

Rabies, a viral disease that affects the nervous system, is perhaps the most widely recognized disease associated with bats.  In 2023 there were 160 rabid bats reported in California, most coming from Southern California.

In specific regions of California, such as El Dorado, Placer, and Nevada County, reports of rabies in bats are common every year, in small numbers.  It is important to note that all three counties have reports of rabies in skunks as well.  Rabies is typically transmitted through the bite or scratch of an infected animal, and bats can carry the virus without exhibiting obvious symptoms. Therefore, any contact with bats, particularly if they appear sick or behave unusually, should be approached with caution.

It's important to note that while rabies in bats is cause for concern, instances of transmission to humans are infrequent. Nevertheless, individuals should seek medical attention promptly if bitten or scratched by a bat to receive appropriate treatment, including post-exposure prophylaxis.  Rabies may be uncommon, however when symptoms begin to show it is always fatal. Bat bites are always urgent

https://www.cdph.ca.gov/Programs/CID/DCDC/pages/reportedanimalrabies.aspx

2. Histoplasmosis: A Fungal Concern with Limited Impact in California

Histoplasmosis is a fungal infection caused by inhaling spores of the fungus Histoplasma capsulatum, commonly found in bat droppings (guano). While cases of histoplasmosis have been reported in California, there does not seem to be active sources.

California's climate and environmental conditions may not be ideal for the growth of histoplasmosis. As a result, the risk of contracting histoplasmosis from bat guano in the Truckee, Lake Tahoe or Grass Valley area is minimal. However, individuals working in environments where bats roost or frequent should still take precautions, such as wearing appropriate protective gear and avoiding inhalation of dust or aerosols from bat droppings.

Remember, just because it is not likely to contain fungus, poop is still bad. Just because there are low rates of histoplasmosis does not mean you can let the problems persist.  Work with a qualified wildlife removal company to get them out as soon as possible.  If you experience flu like symptoms like chills, fever, body aches, fatigue, cough and stuffy chest and have been exposed to bat feces or a bat colony in your attic, let your medical professional know. It is common to find bats in the attic in Grass Valley and Nevada City.  Even though there are rarely attic spaces you will still have bats living in the ceiling around Lake Tahoe and Truckee.

3. White Nose Syndrome: A Threat to Bat Populations

White Nose Syndrome (WNS) is a fungal disease that has decimated bat populations in North America since its emergence in the early 2000s. The disease is caused by the fungus Pseudogymnoascus destructans, which grows on the muzzle, ears, and wings of bats during hibernation.

While WNS is not commonly reported in California, the potential for its introduction and spread remains a concern. The fungus can be inadvertently carried by humans visiting contaminated caves or mines, leading to the inadvertent transmission of the disease to new areas.

Preventing the spread of WNS requires vigilance and cooperation among conservationists, researchers, and the public. Measures such as cleaning tools and equipment, using disposable equipment, and using proper protective equipment populations are essential for mitigating its spread and protecting vulnerable bat species.

 Bats contribute immensely to ecosystems and play vital roles in pest control and pollination, and keeping stable populations is beneficial for everyone. While most diseases in bats are rare in Grass Valley, Truckee, and Tahoe, each one does need to be take seriously.  If you need professional bat removal or would like to talk to a NWCOA Bat Standards Professional please give us a call.