Staphylococcus

Staphylococcus hyicus - Swine Exudative Epidermitis

Staphylococci are large positive spherical bacteria that are immobile and form grape-shaped groups. Form groups, and they are divided into two levels, unlike their close relatives, streptococci, although they are in a similar way, form chains because they divided only on a plane. Staphylococci are facultative anaerobic bacteria.
They grow mainly by aerobic respiration or fermentation which produces lactic acid.
There are two types of colonies formed. Those formed by S. aureus are yellow and S. epidermidis are white.
As a pathogen, it is important to understand the mechanisms of virulence of Staphylococcus to successfully combat the pathogen.

The genes for antibiotic resistance in Staphylococcus aureus found on plasmids or other similar structures.
Staphylococcus epidermidis, which has two genomes sequenced in the speices, is about 2.5 mega-base pairs long with 1,681 open reading frames and G + C content is 32%.
The evolution of this bacterium can occur through asymptomatic colonization and / or during the course of the disease caused.
Staphylococcus hyicus is the pathogen responsible for swine exudative epidermidis, a skin disease which is characterized pig with acute skin lesions and diffuse throughout the animal's body. The disease may be present in the skin of both healthy and diseased animals so that the clinical expression of disease will be associated with pre-disposing causes or concurrent infections.
Clinical signs of swine exudative epidermidis
Pigs with the disease caused by Staphylococcus hyicus, crusted lesions are characterized by a circular shape of varying diameter located around the face, neck and forelimbs, and in advanced stages, even seen through the body of the animal. The skin produces wrinkles and peeling of large areas with a feeling fat and brown-gray color.
In severe cases animals die in most cases, with mortality in the transition phase of 10-15%.