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Aerboes : Organism capable of growth only when exposed to air.
Anaerobes : Organisms capable of growth only when not exposed to air.
Enterococcus bacteria : The enterococcus group is a subgroup of the fecal streptococci that includes S. faecalis, S. faecium, S. gallinarum, and S. avium.The enterococci portion of the fecal streptococcus group is a valuable bacterial indicator for determining the extent of fecal contamination of recreational surface waters. Studies at marine water bathing beaches indicated that swimming-associated gastroenteritis is related directly to the quality of the bathing water and that enterococci are the most efficient bacterial indicator of marine water quality.
Gram-positive and Gram-negative bacteria : The many thousands of known bacterial species have traditionally been classified into two very large groups on the basis of their reaction to Gram Staining. Species which retain a violet coloration despite washing with alcohol are said to stain Gram-Positive; species which lose the violet coloration with alcohol washing and may be counterstained with a contrasting dye, such as safranin, are said to stain Gram-negative.Gram staining characteristics appear to be related to structural or metabolic properties of the species, and this characteristic serves as a rapid and very basic step in the identification of the species.
Gram Positive Bacteria - are generally susceptible to basic dyes; their isoelectric point is about pH 2; and, most important, they are generally more susceptible to antimicrobial agents than Gram-negative species.
Gram Negative Bacteria : are sensitive to acid dyes; their isoelectric point is about pH 5; and, except for the cocci in this grouping, they are generally less sensitive than the Gram-positive bacteria to antimicrobial agents.
Pathogens : Disease causing bacterium or fungus.