Staphylo means a bunch of grapes and coccus means seed . staphylococcus is
arranged in branch or group or clump . So, it is named staphylococcus .
Classification
i)
Staphylococcus aureus ( Golden yellow )
ii)
Staphylococcus albus ( white )
iii)
Staphylococcus
citreus ( Lemon – yellow )
Morphology
i)
Shape and size – They are spherical in shape with a
size of 1 μ in diameter , avarege diameter is 0.7 to 1.2 μ
ii)
Non motile due to absence of flagellum
iii)
Non-sporing
iv)
Non-capsulated
v)
Aranged in grape like cluster
vi)
Some of them may be found in pair or single when
bunches are broken
Diseases produced b y Staphylococcus
Of all varieties of
staphylococcus , staphylococcus aureus is important human pathogen . The
organisms are normally present in skin , nose , mouth and throat . They may
enter into skin through hair follicles , sebaceous glands , sweat glands , abrasion or injury to
the skin .
Skin Lesions ---
a) sycosis
–Pustular inflammation of hair follicles , especially of the beard .
b) Boils
or furuncles
c) Carbuncles
– Multiple adjuscent draining skin sinuses
d) Impetigo
contagiosa – An exudative forms with lesions
e) Pemphigus
neonatorum – It is pustular condition of skin of newborn
Whitlow infection of nail margin and nail bed
Genito urinary tract infection like Cystitis and
Pyelonephritis .
Others
i)
Osteomylitis
ii)
Septicaemia
iii)
Pyaemia
iv)
Pneumonia
v)
Perineal abscess .
vi)
Peritonitis
vii)
Otitis media
viii)
Pericarditis
ix)
Ulcerative endocarditis
x)
Meningitis .
