In-ear headphones are more likely to contain bacteria than earbuds. After wearing earphones for one hour, the bacteria multiplied by nearly 5 times than before; while earphones were worn for one hour, the bacteria multiplied by nearly three times.
Recently, Mr. Zhao, a citizen of Nanchang, called this newspaper and said that the earphones circulating on the Internet are a breeding ground for bacteria. Once the earphones are worn, the air in the ears is difficult to circulate and the temperature rises. High, the bacteria on the surface of the earplugs will multiply quickly, which is not conducive to ear health. Mr. Zhao wants to know, is this rumor true? To this end, our reporter conducted some experiments.
Most citizens have never cleaned their headphones
Before the experiment, reporters conducted random interviews with citizens on the streets of Nanchang. Citizen Ms. Li told reporters that she likes listening to music with headphones and uses headphones very frequently, but she has never cleaned the headphones. “There shouldn’t be many bacteria, right?”
Citizen Mr. Zhang also said that he has never cleaned the earplugs. “Anyway, the earplugs are for his own use. They should not be too dirty, so I don’t think it is necessary.” However, Mr. Zhang also raised a question: “If I want to clean it, how should I clean it? Is it better? Use clean water or a special disinfectant?”
Similar questions exist among most citizens interviewed randomly by reporters. Only a few citizens said that if they see dirt on the earphones, they will wipe them with paper towels or wet wipes, but they have no habit of cleaning them specifically.
In-ear headphones are more likely to contain bacteria than earbud headphones
Experimental props: three pairs of used headphones, single earphone type is No. 1, double The ear-in-ear type is No. 2 and the binaural earplug type is No. 3.
Experimental tools: sterile saline, sterile straws, sterile petri dishes, medical sterilized cotton swabs, etc.
Experimental staff: Ying Yan, Department of Laboratory Medicine, Xihu District Center for Disease Control and Prevention, Nanchang (Note: The results of this experiment are only responsible for this experiment)
In-ear headphones can enter the external auditory canal
The reporter sent Mr. Zhao’s three pairs of headphones In the examination department of the Xihu District Center for Disease Control and Prevention, two of the earphones are stuck in the inner helix and will not penetrate into the external auditory canal when used; while the other in-ear earphones can be directly inserted into the external auditory canal and contact the skin on the ear canal. Which kind of headset hides more bacteria? There is no proof in the mouth, the experiment is the proof.
The experimenter Ying Yan first disinfected the No. 1 earphone, then used a cotton swab to smear and sample the earphone, put the cotton swab into the test tube, and inject 10ml of 0.9% sterile into the test tube Physiological saline, and shake, so that the bacteria on the swab can be evenly mixed in the saline. After that, the experimenter took out 1 ml of the solution from the test tube, poured it on a sterile plate, and added the culture medium.
As for the No. 2 and No. 3 earphones, before the experiment started, the experimenter wore the left ear of the two earphones for an hour, while the right ear was kept intact. After that, the experimenter also sampled the No. 2 and No. 3 earphones. After all the 3 pairs of earphones were sampled, the experimenter put 5 plates into the 36°C incubator for bacterial culture.
Bacteria multiplied nearly 5 times after wearing it for 1 hour
After 48 hours of cultivation, the reporter saw that 4 out of 5 plates had white spots. The experimenter explained that this is a colony formed after 48 hours of cultivation. There are as many white spots as there are colonies. The reporter found that the only thing with no white spots was the sampling on the headphones after disinfection.
After , the experimenter calculated that the No. 1 earphone was aseptic; the left ear of the No. 2 earphone was a sample after 1 hour of wearing, with 120 colonies, and the right ear was an untreated earphone with 25 colonies; The left ear of the No. 3 earphone was also a sample after 1 hour of wearing, with 25 colonies, while the number of colonies in the right ear without treatment was 9. It can be seen that in-ear headphones are more likely to harbor bacteria than earbuds. After wearing earphones for one hour, the bacteria multiplied by nearly 5 times than before; while earphones were worn for one hour, the bacteria multiplied by nearly three times.
The experimenter Ying Yan said that bacteria generally reproduce asexually by a simple two-division method, and the division time is generally 20-30 minutes. Therefore, from this perspective, if you wear the headset for one hour, the bacteria will multiply by up to 5 times. If you don’t wash it all year round, it will accelerate the bacteria’s reproduction.