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Colonies of Micrococcus luteus on Tryptic Soy Agar. Cultivation 48 hours, 37°C. Trypticase soy agar or Tryptic soy agar (TSA) is a growth media for the culturing of moderately to non fastidious bacteria. It is a general-purpose, non-selective media providing enough nutrients to allow for a wide variety of microorganisms to grow.
Kocuria rosea is a gram-positive bacteria that is catalase -positive and oxidase -positive. It has a coccus shape that occurs in the tetrad arrangement and is a strict aerobe that grows best from 25 to 37 °C. [2] K. rosea has also been found to cause urinary tract infections in people with weakened immune systems. [3]
An agar plate is a Petri dish that contains a growth medium solidified with agar, used to culture microorganisms. Sometimes selective compounds are added to influence growth, such as antibiotics. [1] 96 pinner used to perform spot assays with yeast, fungal or bacterial cells. Individual microorganisms placed on the plate will grow into ...
Colonial morphology. In microbiology, colonial morphology refers to the visual appearance of bacterial or fungal colonies on an agar plate. Examining colonial morphology is the first step in the identification of an unknown microbe. The systematic assessment of the colonies' appearance, focusing on aspects like size, shape, colour, opacity, and ...
To the naked eye, on a TSA plate, colonies appear smooth, circular, yellowish, and 1–2 mm in diameter. Growth can occur at pH values ranging from 6.0 to 9.5, with an optimal range of 6.0 to 8.0. A. phytoseiuli tests negative for the Oxidase reaction , but catalase activity is detectable.
Methicillin-resistant Staphylococcus aureus (MRSA, often pronounced / ˈmɜːrsə / or / ɛmɑːrɛseɪ /), is one of a number of greatly feared strains of S. aureus which have become resistant to most β-lactam antibiotics. For this reason, vancomycin, a glycopeptide antibiotic, is commonly used to combat MRSA.
Serratia marcescens (/ səˈreɪʃiə mɑːrˈsɛsɪnz /) [3][failed verification] is a species of rod-shaped, Gram-negative bacteria in the family Yersiniaceae. It is a facultative anaerobe and an opportunistic pathogen in humans. It was discovered in 1819 by Bartolomeo Bizio in Padua, Italy. [4] S. marcescens is commonly involved in hospital ...
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. [5] It is a catalase -positive, [10] coagulase -negative, facultative ...