Staphylococcus epidermidis lives on everyone’s skin. The bacteria prefer sweaty places, such as your armpits, but are also found on your back and in your nostrils.
What is the typical life of a t8 fluorescent lamp? average life of fluorescent ballast.


What is the common habitat of staphylococcus?

Their natural habitat includes humans and animals. They are part of the natural skin flora, specifically colonizing external mucous membranes. However, these bacteria are often found in the environment (untreated water, soil and contaminated objects).

What does Staphylococcus epidermidis need to grow?

Conditions for Growth: epidermidis is facultatively anaerobic and has a temperature range for growth from 15° to 45°C. However, the species grows best at 30° to 37°C in aerobic conditions.

What media does Staphylococcus epidermidis grow on?

Staphylococcus epidermidis grows on MSA, but does not ferment mannitol (media remains light pink in color, colonies are colorless).

How do you get Staphylococcus epidermidis?

Most staph germs are spread by skin-to-skin contact. They can also be spread when you touch something that has the staph germ on it, such as clothing or a towel. Staph germs can then enter a break in the skin, such as cuts, scratches, or pimples. Usually the infection is minor and stays in the skin.

What is the morphology of Staphylococcus epidermidis?

Cellular morphology and biochemistry Staphylococcus epidermidis is a very hardy microorganism, consisting of nonmotile, Gram-positive cocci, arranged in grape-like clusters. It forms white, raised, cohesive colonies about 1–2 mm in diameter after overnight incubation, and is not hemolytic on blood agar.

Is Staphylococcus epidermidis aerobic or anaerobic?

Staphylococcus epidermidis is a well-characterized, nonfastidious, aerobic gram-positive coccus commonly isolated in the clinical microbiology laboratory.

Is Staphylococcus epidermidis virulence factors?

The most significant virulence factors in S. epidermidis are described as below: Biofilms: The bacterial surface adhesive accumulation that is embedded in an extracellular matrix that creates the bacteria protection against host defense mechanisms and antimicrobial agents.

Does Staphylococcus epidermidis produce catalase enzyme?

epidermidis being a catalase-producing bacterium29, the role of catalase in the tolerance of S. epidermidis biofilm against heat, NaCl, NaOCl or H2O2-exposure has not been fully investigated.

What are the characteristics of Staphylococcus species?

Characteristics. Staphylococci are Gram-positive, nonspore forming, facultatively anaerobic, nonmotile, catalase-positive or negative, small, spherical bacteria from pairs to, grape-like clusters, from where the name Staphylococcus comes from (staphyle, meaning a bunch of grapes, and kokkos, meaning berry).

Where is Staphylococcus aureus found in the environment?

Staphylococcus aureus is a bacterium that causes staphylococcal food poisoning, a form of gastroenteritis with rapid onset of symptoms. S. aureus is commonly found in the environment (soil, water and air) and is also found in the nose and on the skin of humans. S.

How does Staphylococcus epidermidis move?

One form is called spreading, which is a type of sliding motility and the second form involves comet formation, which has many observable characteristics associated with gliding motility. Darting motility has also been observed in Staphylococcus epidermidis.

What does S epidermidis cause?

Staphylococcus epidermidis can cause wound infections, boils, sinus infections, endocarditis and other inflammations. The bacterium can reside for a long period of time in “hiding places” in the body, where it is not noticed by the immune system, and therefore also not fought.

What is Staphylococcus epidermidis known for?

Staphylococcus epidermidis can cause infections from implantation of medical devices such as cardiac devices, orthopedic devices, and CNS shunt. Up to 20% of patients with cardiac devices can become infected and can show signs of erythema, pain, purulence around the site of the infection, and sepsis.

Can Staphylococcus epidermidis cause urinary tract infection?

Results: S. epidermidis was identified as the causative organism of UTIs in children with underlying urinary tract abnormalities. Conclusion: UTIs caused by S. epidermidis in a previously healthy child should not be disregarded as a contaminant and further workup for urinary tract abnormality is indicated.

Is Staphylococcus epidermidis the same as MRSA?

Also called “Methicillin-Resistant Staphylococcus epidermidis”, inhabit typically on human epidermis (skin). Like the MRSA is a multidrug resistant organism. The MRSE can be distinguished from the MRSA by its biochemical reaction to the Coagulase (enzyme which coagulates blood plasma). The MRSE is a coagulase negative.

What is the morphology of staphylococcus?

Staphylococci are Gram-positive cocci about 0.5 – 1.0 μm in diameter. They grow in clusters, pairs and occasionally in short chains. The clusters arise because staphylococci divide in two planes.

What is the difference between Staphylococcus aureus and Staphylococcus epidermidis?

aureus is often hemolytic on blood agar; S. epidermidis is non hemolytic. Staphylococci are facultative anaerobes that grow by aerobic respiration or by fermentation that yields principally lactic acid. The bacteria are catalase-positive and oxidase-negative.

Does Staphylococcus epidermidis require oxygen?

Staphylococcus epidermidis is a facultative anaerobe, i.e. it can survive in a wide range of [O2].

Does Staphylococcus epidermidis need oxygen?

Staphylococcus epidermidis is a Gram-positive saprophytic bacterium found in the microaerobic/anaerobic layers of the skin. It becomes a health hazard when introduced across the skin by punctures or wounds. S. epidermidis forms biofilms in low O2 environments.

What is the metabolism of Staphylococcus epidermidis?

epidermidis metabolism went from respiratory to fermentative. Remarkably, the rate of growth decreased at low [O2] while a high concentration of ATP ([ATP]) was kept. Under hypoxic conditions bacteria associated into biofilms. Aerobic activity sensitized the cell to hydrogen peroxide-mediated damage.

What is the epidemiology of Staphylococcus epidermidis?

More precisely, S. epidermidis accounted for 35 bloodstream infections (39.8%), 14 surface infections (29.8%), and 7 cases of meningitis (58.3%). Other less frequently isolated pathogens were S. aureus (27.2% of all infections), Klebsiella pneumoniae (16.3%), and Candida albicans (9.2%).

Is Staphylococcus epidermidis resistant to methicillin?

Staph. epidermidis isolates from nosocomial infections frequently are resistant to methicillin; however, resistant isolates often appear to be susceptible to methicillin unless reliable methods of susceptibility testing are used.

Do all Staphylococcus produce catalase?

Species of the genus Staphylococcus are characterized by the production of catalase. Among them, only two species, Staphylococcus saccharolyticus and Staphylococcus aureus subsp. anaerobius, are not able to produce catalase (2, 3). Although it is well known that nearly all strains of S.

Do all staphylococcus have catalase?

Staphylococcus species are catalase positive and facultatively anaerobic, except for S. aureus subsp. anaerobius and S. saccharolyticus, which are catalase negative and anaerobic.

Is Staphylococcus epidermidis motile or non motile?

Type of motilityExample speciesOther associated factorsDartingStaphylococcus epidermidisPoorly studied; many basic features are unknown (e.g. it is adhesive or electrostatic factors holding the cells together)

What is the most common species of Staphylococcus found on the skin?

epidermidis is the staphylococcal species that is most frequently isolated from the human skin [10].

Can Staphylococcus be found in water?

Staphylococcus aureus species is able to survive in drinking water distributed by public devices. Chlorine concentrations below the recommended level favors the growth of the pathogen.

Can Staphylococcus aureus be found on surfaces?

Methicillin-resistant Staphylococcus aureus (MRSA) can survive on some surfaces, like towels, razors, furniture, and athletic equipment for hours, days, or even weeks. It can spread to people who touch a contaminated surface, and MRSA can cause infections if it gets into a cut, scrape, or open wound.

What is a likely source of staphylococcus bacteria?

Most people get staph poisoning by eating contaminated food. The most common reason for contamination is that the food has not been kept hot enough [140°F (60°C) or above] or cold enough [40°F (4°C) or below]. Foods that are associated with staph food poisoning include: Meats.

Does Staphylococcus aureus have endospores?

Staphylococcus aureus are Gram-positive, catalase-positive bacteria that do not produce endospores.

Is Staphylococcus epidermidis susceptible to penicillin?

S. epidermidis strains harbored the highest prevalence of resistance against penicillin, tetracycline, erythromycin, cefazolin, and trimethoprim-sulfamethoxazole antibiotic agents. All S. epidermidis strains had resistance against at least three different types of antibiotics.