The cause of seborrheic dermatitis is unknown, but investigators believe that alteration in the immune system in HIV-AIDS, changes the response of the skin to the yeast, Pityrosporum ovale
, leading to a higher rate of infection.25
A fungus (yeast) infection with pityrosporum ovale
called tinea versicolor, which interferes with skin pigmentation.
Seborrheic dermatitis (SD) is a chronic dermatitis caused by Malassezia yeast species, including Malassezia (Pityrosporum ovale
Dandruffaffects about half of the population and is caused by a yeast infection on the scalp called Pityrosporum ovale
. It can be controlled by shampoos containing tar, selenium sulphide or zinc pyrithione.
(3-4) Tea tree oil has been shown to inhibit or kill many detrimental micro-organisms such as Eschericia coli, Mycoplasma pneumoniae, Porphyromonas gingivalis, Propionibacterium acnes, Pseudomonas aeruginosa, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus mutans, Streptococcus pyogenes, detrimental fungi on the skin, Candida albicans, Pityrosporum ovale
, Trichophyton mentagrophytes, detrimental protozoa, Trichomonas vaginalis, and Herpes Simplex Virus Type 1-2.
One showed that patients with atopic dermatitis of the head and neck developed IgE antibodies against the yeast Pityrosporum ovale
much more often than did their control group.
Experts are certain that the yeast pityrosporum ovale
is linked to dandruff but they are unclear whether it actually causes it, or whether the flaky skin provides an ideal environment for the yeast to thrive.
Ovace provides a broad spectrum of activity against Pityrosporum ovale
, as well as both gram-positive and gram-negative bacteria.
In the last 2 years, there have been 37 published studies--nearly all of them from Europe and Asia--supporting a link between atopic dermatitis and airborne allergens such as dust mites, cat dander, and Pityrosporum ovale
The culprit is a natural yeast called Pityrosporum Ovale
. Most cases will resolve with the use of anti-dandruff shampoo once or twice weekly, such as those containing zinc pyrithione.