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How do we detect demodex?

It is not difficult to detect demodex. One has only to squeeze out a whit thread-like sebum from the skin and place it in a drop of sesame oil on a slide. After the sebum has been fully dissolved in oil and the demodex dispersed, observe under a microscopic under a low-power microscope, bean worm-like demodex can be seen. Under a high power microscope, the image is bigger and we can see the eight legs of the demodex moving while it shakes its head and tail. Sometimes it will move slowly ahead, protrud ing and retacting its two-mouth organ-stylets as if it was feeding on some food. The detected demodex species and the infectiosity number may serve as the basis of treatment for clinical physicians and computerized clinical diagnosis and treatment.

1. Why is the seasame oil used to dilute sebum? Demodex stays in sebum which should be diluted otherwise it cannot be easily observed, classified and calculated. There are numerous solvents for diluting sebum, such as glycerol, sodium hydroxide, dimethyl benzene, salt water, ethyl alcohol, propenoic acid ester, liquid ceresin wax, animal fat etc. According to the author’s experience, sesame oil is better because it has a stable solvent point and good transparency and can easily dissolve sebum, It is also harmless and non-irritating, even to the demodex, thus making observation easy.

2. How so we preserve specimens? We do this by using Hoyer’s liquid specimen dyeable slide for long term preservation of specimens.

3. The demodex detecting process:

2. Diagnose and observe rash condition.

Ask for medical history and write case story.

Epidemiology of Demodex

3-1 What phenomenon will appear after the human
Skin is infested with demodex?


Due to differences in mutual conditions, three types types of features might ap-
pear after the human skin has been infested with demodex:

1. Most will experience the “demodex Infestation Phenomenon.” The facial skin of 97.68% adult males and females has been found to be infested with demodex, though they do not suffer from any illnesses. This is known as the “Demodex Infestation Phenomenon.”

2. There is also the rare “Demodex Carrier Phenomenon,” where infectiosity
Is high, but symptoms of illness do not appear. Very few people will experience the “Morbidity Phenomenon,” i.e. demodcidosis and demodectic acne rosacea. These people have weak resistance, high demodex infectisosity and are very prone to illnesses.

3-1 What phenomenon will appear after the human Skin is infested with demodex?


Under normal circumstances, it is sufficient for demodex to survive by feed ing on the issue and cell cytoplasm and metabolite from hair follicles and sebaceous glands. (Actually the demodex are external parasites living in the outer layer of the skin). There is no need to penetrate deep into the skin or harm the skin. The relationship of demodex and man us usually in balance and the former is unlikely to cause diseases to the latter. Therefore, if the demodex inspection on the normal skin of a healthy person appears to be positive, it is considered to be the Demodex Infestation or Demodex Infestation Phenomenon, which is very common. In our demodex infestation epidemiological mass sampling survey of various races in China and abroad, the statistical result of 902,595 people surveyed is: no demodex was detected in 6 day old babies, infestation rate was 0%. Children’s demodex in the human skin may expand the hair follicles and pores and proliferate the sebaceous glands, roughen the skin and cause baldness. Once the infectivity has intensified and the resistance of the human body to demodex is weakened, morbidity may set in. Therefore, we should attach importance to the demodex infestation phenomenon as it is related to prevention and cosmetology.

A sample survey conducted of 902 505 people has shown the following results: Demodex has been detected on the faces of staggering 97.68% adult male and females.

97.68% ADULTS HAVE DEMODEX

Demodex incidence: 97.68% (Adult males and females)

New born babies (within 6 days) 0%
Children Rate increases with age
Adult males and females 97.68%

There are no national, racial, regional, climatic, occupational and sexual differences in demodex infestation in humans. Question: Why are adult males and females not harmed by demodex which commonly infests the face.

Question: Does long-term infestation of demodex cause any harm to the skin of the 97.68% of adult males and females infected. Answer: It should also be answered by infectiosity of demodex.

Answer: Since the infestation rate of demodex ( qualitative determination) cannot be used to analyze it, the infectiosity of demodex (quantitative determination) should be used to explain it.

Demodex Infestation Phenomenon – expanded pores and rough skin. According to the survey 97.68% of adult males and females are infested with demodex.
3-3 What is”Demodex Carrier Phenomenon”

There are still 7.21% of the 97.68% demodex infested adults whose faces have more demodex. Although their demodex count is above the pathogenic limit, they can still live peacefully with the demodex in their skin and show no sign of illness. Medically, this is considered to be the :Demodex Carrier Phenomenon.” Although demodex carriers remain normal, due to their high demodex count the possibility of their transmission to other people is very great. Therefore, they too need treatment to prevent transmission.

Demodex carrier phenomenon: Very few people have high demodex infestation but their skin remains normal, and are not prone to disease over a long period of time. In medical terminology, they are known as “Demodex carriers:: Although they themselves could live peacefully with demodex, they might transmit it to other people. Therefore, they need demodex killing drugs to of the pest.

What is the Morbidity of Demodex?

The sickness rate of diseases caused by the demodex to man is called the morbidity of demodicidosis. These diseases include Demodectic Deimatitis, Demodectic Acne Rosacea, Belepharitis (blear-eye), Otitis Externa, etc. In the above survey, the morbidity of Demodicidosis is 0.49%. The Demodex infectiosity of Demodicidosis patients is very high with over 44 demodex per person for mildly infested patients to over 100 Demodex per person for seriously infested patients. Therefore, there are differing infectiosity and morbidity of Demodicidosis. The higher the Demodex count, the more serious the disease caused