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Streptococcus [49] and Enterococcus spp. are catalase-negative. While the catalase test alone cannot identify a particular organism, it can aid identification when combined with other tests such as antibiotic resistance. The presence of catalase in bacterial cells depends on both the growth condition and the medium used to grow the cells.
The species of the genus Aquabacterium are motile, rod-shaped, Gram-negative, oxidase-positive, catalase-negative bacteria which were isolated from drinking water biofilms in Berlin. [1] [3] Identified species include Aquabacterium citratiphilum, Aquabacterium parvum, and Aquabacterium commune. Three bacterial strains isolated from biofilms of ...
As mentioned, S. agalactiae is a Gram-positive coccus with a tendency to form chains, beta-haemolytic, catalase-negative, and facultative anaerobe (anaerobic organism).GBS grows readily on blood agar plates as microbial colonies surrounded by a narrow zone of β-haemolysis.
Most streptococci are oxidase-negative and catalase-negative, and many are facultative anaerobes (capable of growth both aerobically and anaerobically). The term was coined in 1877 by Viennese surgeon Albert Theodor Billroth (1829–1894), [3] by combining the prefix "strepto-" (from Ancient Greek: στρεπτός, romanized: streptós, lit.
Erysipelothrix rhusiopathiae is a Gram-positive, catalase-negative, rod-shaped, non-spore-forming, nonacid-fast, nonmotile bacterium.Distributed worldwide, E. rhusiopathiae is primarily considered an animal pathogen, causing the disease known as erysipelas that may affect a wide range of animals.
They are gram-positive, catalase-negative, non-motile cocci that are found singly, in pairs, or in chains. The genus contains strains known to grow at or below 7˚C. [3] Twelve species of Lactococcus are currently recognized. [4] They are: Lactococcus allomyrinae; Lactococcus carnosus; Lactococcus chungangensis
Streptococcus mitis is a species of Gram-positive, mesophilic, alpha-hemolytic bacteria in the genus Streptococcus.These bacteria are facultative anaerobes, and made up of non-motile and non-sporing cocci (round cells) that are catalase negative.
Cardiobacterium species are Gram-negative, pleomorphic rod-shaped bacteria that are catalase-negative and oxidase-positive. When compared morphologically, the two Cardiobacterium species are indistinguishable in culture and Gram stain , however the two differ in growth patterns: C. valvarum is more fastidious than C. hominis , and is non ...