Concerns About Possible Animal Bites and Rabies Risk: What to Do? - Internal Medicine

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Infection issues


Hello, doctor.
I would like to ask you about an incident that happened last Tuesday.
While I was riding my motorcycle at a speed of about 30 km/h, I suddenly felt a sharp pain near my right knee.
At that moment, I didn't notice anything hitting me, and I don't recall seeing any animals.
However, when I got home, I found three small circular wounds, approximately 0.2 mm in size.
They didn't bleed, but there was a slight redness and some short scratch-like marks.
The redness was present on the day of the injury but disappeared the next day.
My pants were not torn, but I'm very concerned that I might have been bitten by something unknown, and I'm afraid of rabies.
Doctor, what is the likelihood of this? Do I need to get vaccinated? Since I'm not sure if I was bitten by an animal, I assume I can't get the vaccine, right? The chance of being bitten by a ground animal while riding a motorcycle seems low, doesn't it? It seems unlikely for a ground animal to jump up and bite my knee while I'm in motion.
Should I seek medical attention? I really didn't see anything at the time...
However, my leg still feels a bit sore and strange.
Am I overreacting? (After doing other activities, the strange feeling went away, but it returned when I started worrying.) The small wounds have healed, but today I found a dead mouse about 250-350 meters away, which made me even more anxious.
I also called 1922, and they advised me not to worry too much and to observe the situation.
They mentioned it could have been a stone that hit me, and the mouse might not be related.
I asked the Taiwan rabies prevention website on Facebook, and they also said it's unlikely, but they didn't provide any guarantees.
I'm really worried.
Thank you, doctor.
I hope you can help me analyze this.
I live in Chiayi City, which I understand is a non-endemic area for rabies.
Thank you, doctor.

Niming, 20~29 year old female. Ask Date: 2016/06/28

Dr. Hong Yuanbin reply Internal Medicine


Currently, urban areas, including Chiayi City, are not considered rabies-endemic regions, and there have been fewer cases of rabies reported in mountainous areas recently, so the risk is indeed very low.
Moreover, without any obvious bite wounds, the likelihood of contracting rabies is also very low.
Therefore, it is recommended to simply monitor your symptoms with peace of mind.
The incubation period for rabies is approximately 1 to 3 months, and medical evaluation is only necessary if rabies-related symptoms occur during this period, such as fever, headache, or unusual sensations at the site of a bite.
However, the chances are indeed very low, so please rest assured.
Thank you for your inquiry.

Reply Date: 2016/06/28

More Info


When it comes to concerns about possible animal bites and the risk of rabies, it's important to approach the situation with a clear understanding of the facts and the appropriate steps to take. Based on your description, it seems you experienced some minor injuries that you suspect may have been caused by an animal bite, but you did not see any animal at the time. You also mentioned finding a dead mouse nearby, which has heightened your anxiety about rabies.

First and foremost, rabies is primarily transmitted through the saliva of an infected animal via bites. The most common carriers of rabies are wild animals, such as bats, raccoons, and foxes, but domestic animals like dogs and cats can also be carriers if they are not vaccinated. In your case, since you did not see an animal bite you and the injuries are small and superficial, the likelihood of rabies transmission is extremely low. Rabies is not transmitted through contact with fur or skin, and the chance of being bitten by a ground animal while riding a motorcycle is indeed very low.

The symptoms you described, such as the small red marks and the sensation of pain, could be attributed to a variety of non-rabies-related causes, including minor abrasions from contact with objects or even an insect bite. The fact that the redness subsided quickly and there was no bleeding is a good sign. However, if you continue to feel discomfort or if the area becomes increasingly red, swollen, or painful, it would be wise to seek medical attention.

Regarding the dead mouse you found, while rodents can carry various diseases, rabies is not typically associated with them. The concern with rodents is more about other infections, such as hantavirus or leptospirosis, rather than rabies. Nonetheless, it is always a good practice to avoid contact with dead animals and to wash your hands thoroughly if you do touch anything that may have come into contact with them.

As for rabies vaccination, the general recommendation is to consider post-exposure prophylaxis (PEP) if there is a clear risk of exposure to a rabid animal. Since you did not see an animal bite you and the injuries are minor, it is unlikely that you would need the rabies vaccine. However, if you experience any new symptoms, such as fever, headache, or unusual behavior, or if you have any doubts about the nature of your injuries, it would be prudent to consult a healthcare professional for an evaluation.

In summary, while your concerns are understandable, the risk of rabies in your situation appears to be very low. It is always better to err on the side of caution, so if you have any lingering doubts or if your symptoms change, seeking medical advice is the best course of action. Regular hand hygiene and avoiding contact with wild animals are good preventive measures to keep in mind. If you have further questions or if your anxiety persists, discussing your concerns with a healthcare provider can provide reassurance and guidance.

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