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Demodex and Blepharitis

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"Although there are many conditions for the dysfunction of the meibomian glands, one particular skin condition, rosacea, can block the functioning of the meibomian gland.

The species Demodex folliculorum found in follicles of the hair and in meibomian glands is present in larger quantities in rosacea patients. The over deposit of these species may possibly prompt the immune system, as in many rosacea patients the eyes may appear red or watery (ocular rosacea) and patients have a feeling of irritation in the eyes.

The two species of Demodex, the genus of tiny mites, are responsible for blepharitis. Anterior blepharitis is caused by Demodex folliculorum and posterior blepharitis is caused by Demodex brevis. While the Demodex mite creates direct damage, it also carries the bacteria Staphylococci that cause Staphylococcal infections."

Blepharitis Types and Causes, By Susha Cheriyedath, MSc, News Medical Life Sciences

A recent report concluded, "As a result, the Demodex count was significantly higher in the primary demodicosis and rosacea patients than the control group. We think that every Demodex-positive patients should be evaluated for also eyelash mites to prevent a possible chronic blepharitis."

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