Disease sexually transmitted:

Tertiary syphilis

Black Piedra

  • What is the Black Piedra
  • What triggers / Causes of Black Piedra
  • Pathogenesis (what is happening) during the Black Piedra
  • The symptoms of Black Piedra
  • Diagnosis Black Piedra
  • Treatment of Black Piedra
  • Prevention of Black Piedra
  • Which doctors should be consulted if You have a Black Piedra

What is the Black Piedra

Black Piedra (piedra nigra) – antropos mycotic lesion of the hair cuticle with the formation of nodules on it in black.
Black Piedra is described Desenne in 1878, the Disease often registered in countries with warm or tropical climate. In individuals with immunodeficiencies possible fungemia with the development of endophthalmitis, brain abscesses, endocarditis, etc.

What triggers / Causes of Black Piedra:

The causative agent of black Piedra - mold fungus Piedraia hortae. The disease recorded in the humid tropical regions of South America and Indonesia. The pathogen is capable of both surface and internal growth (in the direction of the hair shaft), leading to increased hair breakage.
Black Piedra is mainly concentrated in Central and South America (Argentina, Chile, Colombia, Brazil, Uruguay, Paraguay) and Africa and also in India, China, Burma, Thailand.

Pathogenesis (what is happening) during the Black Piedra:

Source of piety is a sick man. Black Piedra occurs more frequently in people with straight hair, at least - I have curly hair - perhaps that is why it is very rare representatives Australoid-Negroid race.
Due to the frequent occurrence of piety swimmers, expressed the view about their infection by fungi, saprofitiruyuschem on some species of marine plants.
The development of the disease contribute to high temperature and humidity environment, the unwashed hair, the contamination of flour and sugar dust, wearing tight hats, bandages, compressing the hair, hair clips, brooches, etc. of Great importance are some national customs and habits, for example, lubrication hair vegetable oils, lactic acid products followed a tight pulling of the hair. Sometimes multiple lesions hair leads to their bonding with the formation of bundles, resembling bundles of hay - so-called "Colombian plica".

The symptoms of Black Piedra:

Clinically black Piedra occurs asymptomatic - on hair in the scalp, less growth of mustache and beard appear multiple (30-50 or more) shallow stony hardness nodules, motoblaze surrounding hair and firmly attached to its surface. The small size consistently: they can be detected only by palpation in the conduct of the affected hair between the toes or reach 1 to 2 mm in diameter.
Some patients in the merger of closely spaced knots hair appears as if surrounded by a solid coupling, the length of which usually does not exceed 3 to 5 mm When viewed under a magnifying glass nodules have a rough oval or fusiform shape. Color brownish nodules, deep brown or black. Less frequently they are of a grayish or reddish color.
The origin of the nodules represent a mosaic located and firmly cemented the spores of the fungus, which can be detected not only on the surface of the hair, but to get inside it, therefore the hair becomes brittle.
Any inflammation on the scalp does not happen. Smooth skin and nails are not affected. When combing hair sometimes reveals a metallic sound. Without treatment, the disease can last months and years.
Sometimes they merge, forming a solid short (3-5 mm) coupler composed of firmly cemented mycelium and spores. The nodules are easily detected by palpation. Sometimes in a tight pulling of the hair knots are glued together, forming bundles, resembling sheaves of cereals ("Colombian plica"). When bending such hair heard the crunch of a kind, caused by the destruction of the dense colonies of the fungus. Hair at Piedra't break off, as not only the substance, but the hair cuticles in the process are not involved.

Diagnosis Black Piedra:

The diagnosis is easily established on the basis of specificity of clinical symptoms. In difficult cases the diagnosis can be confirmed by microscopy and culture studies. In the nodules on hair microscopy revealed a broad (4-6 µm) mycelium, divided into oval, round and rectangular arthrospores located mosaic or clusters.
On Wednesday Saburo grayish-yellow, dark cream, black colonies. The causative agent of black Piedra have ASCI with ascospores 2-8 to 50 microns in diameter.
The Piedra differentiate from the so-called false Piedra caused by bacteria forming on the porous medium Saburo cream-colored colonies with scalloped border on the periphery, head lice.
Black Piedra

Treatment of Black Piedra:

The most effective treatment of black Piedra shaving hair, after which quickly recovery occurs. If the patient refuses to shave hair, it is shown daily shampooing with a hot solution of corrosive sublimate (mercury dichloride) in a dilution of 1:1000 and combing out the knots comb, followed by shampooing with hot water and soap. For the treatment is also used amphotericin B, sometimes in combination with 5-fortitudinem. Inside is recommended to take vitamin A.

Prevention of Black Piedra:

To prevent black Piedra should observe the rules of personal hygiene.

Which doctors should be consulted if You have a Black Piedra:

More in this category: « White Piedra (knotty trichosperma) Candidiasis introduction »

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Acetylsalicylic acid