Dermatomycosis and Dermatophytes in Zoology
Mustansiriyah University
Mustansiriyah University
College of science
College of science
Biology Dept.
Biology Dept.
Zoology
Zoology
4th class
4th class
Zoonoses lab. (
Zoonoses lab. (
5
5
)
)
Dermatomycosis {Dermatomycosis {DERMATOPHYTES
DERMATOPHYTES
}
}
Dermatomycoses
are infections of the skin, hair or
nails by fungi. The principal causative agents are
dermatophytes
, which are subdivided into three groups
(genera):
1.
Microsporum spp
.,
2.
Trichophyton spp
.
3.
Epidermophyton floccosum
.
The three genera are distinguished by the form of
the
spores
, or
macroconidia
.
CHARACTERISTICS
CHARACTERISTICS
Trichophyton
: thin-walled, smooth, four to six septa
Microsporum
: thick-walled, with projections five to more septa
Epidermophyton
: thick-walled, pear to oval shaped four or fewer
septa
Besides the
dermatophytes
, yeasts are also capable of causing
skin disorders. The most frequent agents in this case are
Candida
spp. and
Pityrosporum
.
DERMATOPHYTES - CLASSIFICATION
DEVELOPMENT OF A DERMATOPHYTOSIS
DEVELOPMENT OF A DERMATOPHYTOSIS
direct contact with infected persons or animals, but it is more
often a question of contact with fungal spores. These spores are
contained in epithelial (skin) elements of infected persons
everywhere in our environment. The floors of communal shower
stalls and changing rooms are major sources of infection. For the
development of an infection, however, more is needed than
contact alone.
Dermatophytes
prefer warm, moist conditions. This is why a dry,
intact skin constitutes a virtually impenetrable barrier. But the
chance of infection is encouraged by everything that has an
adverse influence on the situation.
DERMATOPHYTES - PREFERRED SITES
OF INFECTION
Most
dermatophytes
have been found to have a preference
for certain situs. A preference for growth in and
around the
hair
,
in the horny layer of
skin
,
in the moist, warm folds of
the skin, or just under the
nails
.
Trichophyton
species have
been found to have the greatest adaptability.
Epidermophyton floccosum
occurs principally in
the large
flexure lines and around the foot
.
Microsporum
chiefly
attacks the
scalp and glabrous skin
.
Furthermore, the preferred sites of infection of
dermatophytes
are, to a certain extent, also determined by
the situs where the skin comes into contact with the fungal
spores
.
Dermatomycosis, caused by dermatophytes such as Trichophyton, Microsporum, and Epidermophyton, is a common skin infection by fungi. This article explores the characteristics, classification, development, preferred sites of infection, and more related to dermatophytes in the field of zoology.
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Presentation Transcript
Mustansiriyah University College of science Biology Dept. Zoology 4th class Zoonoses lab. (5)
Dermatomycosis {DERMATOPHYTES} Dermatomycoses are infections of the skin, hair or nails by fungi. The principal causative agents are dermatophytes, which are subdivided into three groups (genera): 1. Microsporum spp., 2. Trichophyton spp. 3. Epidermophyton floccosum. The three genera are distinguished by the form of the spores, or macroconidia.
CHARACTERISTICS Trichophyton: thin-walled, smooth, four to six septa Microsporum: thick-walled, with projections five to more septa Epidermophyton: thick-walled, pear to oval shaped four or fewer septa Besides the dermatophytes, yeasts are also capable of causing skin disorders. The most frequent agents in this case are Candida spp. and Pityrosporum.
DEVELOPMENT OF A DERMATOPHYTOSIS direct contact with infected persons or animals, but it is more often a question of contact with fungal spores. These spores are contained in epithelial (skin) elements of infected persons everywhere in our environment. The floors of communal shower stalls and changing rooms are major sources of infection. For the development of an infection, however, more is needed than contact alone. Dermatophytes prefer warm, moist conditions. This is why a dry, intact skin constitutes a virtually impenetrable barrier. But the chance of infection is encouraged by everything that has an adverse influence on the situation.
DERMATOPHYTES - PREFERRED SITES OF INFECTION Most dermatophytes have been found to have a preference for certain situs. A preference for growth in and around the hair, in the horny layer of skin, in the moist, warm folds of the skin, or just under the nails. Trichophyton species have been found to have the greatest adaptability. Epidermophyton floccosum occurs principally in the large flexure lines and around the foot. Microsporum chiefly attacks the scalp and glabrous skin. Furthermore, the preferred sites of infection of dermatophytes are, to a certain extent, also determined by the situs where the skin comes into contact with the fungal spores.
