2 Mar 2013 The identification of M.catarrhalis was based primary on colonial morphology, Gram stain and a number of biochemical tests namely; Oxidase,

Moraxella catarrhalis, formerly known as Branhamella catarrhalis, is a Gram-negative, aerobic, nonmotile, nonspore-forming, oxidase-positive, and catalase-positive diplococcus.

Moraxella catarrhalis is now recognized as an important cause of upper and lower respiratory tract infections in children and adults. 2016-08-16 · Expectorated sputum, smear, Gram stain, light microscopy, MPV. Mixed materials, type I, layered. Contaminating bacteria and epithelial cells, moderate. Purulence, light. Gram-negative diplococci. Morphology suggests pathogenic Neisseria or Moraxella spp. Routine bacterial culture isolated Moraxella catarrhalis.

The gender Moraxella on Gram stain they can be seen as Gram negative diplobacilli, coccobacilli or diplococci, depending on the species. In the particular case of Moraxella catarrhalis, it is the only species that has a Gram negative diplococcal morphology. Moraxella catarrhalis micrograph. Smear made from a colony (blood agar). Morphology: Gram-negative coccobacilli, occur predominantly in pairs; have a tendency to resist Gram stain decolorization.

It is named after the Swiss ophthalmologist Victor Morax. The organisms are short rods, coccobacilli, or as in the case of Moraxella catarrhalis, diplococci in morphology, with asaccharolytic, oxidase -positive, and catalase -positive properties.

Moraxella catarrhalis micrograph. Smear made from a colony (blood agar). Morphology: Gram-negative coccobacilli, occur predominantly in pairs; have a tendency to resist Gram stain decolorization.

I-Macroscopically ngemuva kwamahora angama-24 ekufukameleni ku-agar yegazi, amakoloni amancane, akhomba angaphansi kuka-0.5 mm ububanzi abonwa, anombala ompunga. 2015-08-02 · The members of the genus Neisseria discussed in this chapter and M. catarrhalis appear as gram-negative diplococci (Figure 40-2) with adjacent sides flattened. They are often referred to as “kidney bean”–shaped diplococci. - Gram stain morphology: gram negative diplococci (gndc) Catalase positive Oxidase positive - Capnophilic, grow in high CO2 env.

Moraxella catarrhalis gram stain morphology

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Catarrhalis forms round opaque colonies on blood and chocolate agar, and the colonies can be slid around agar surfaces without being disrupted; this is called the "hockey puck sign". One interesting feature of the cellular structure of M. catarrhalis is the presence of trimeric autotransporter adhesins, which are essentially a type of virulence factor. The members of the genus Neisseria discussed in this chapter and M. catarrhalis appear as gram-negative diplococci (Figure 40-2) with adjacent sides flattened. They are often referred to as “kidney bean”–shaped diplococci.
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Se hela listan på antimicrobe.org Table 1: Characteristics of Moraxella catarrhalis used in its identification. Colonial morphology on ox blood agar Chocolate agar Nutrient agar Gram stain Oxidase Catalase Deoxyribonuclease Reduction of nitrate Utilisation of CTA sugars glucose maltose sucrose lactose : white, opaque, smooth : growth : growth : gram-negative diplococci Moraxella catarrhalis is a fastidious, nonmotile, Gram-negative, aerobic, oxidase-positive diplococcus that can cause infections of the respiratory system, middle ear, eye, central nervous system, and joints of humans. It causes the infection of the host cell by sticking to the host cell using trimeric autotransporter adhesins Moraxella spp. are Gram-negative diplococci that morphologically and phenotypically resemble Neisseria spp. They are strictly aerobic, oxidase-positive, catalase-positive, DNAse-positive and asaccharolytic.

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14 Aug 2007 Identification of Moraxella species and morphologically similar organisms. Moraxella catarrhalis is the most frequently isolated species of.

Download as PDF. Catarrhalis forms round opaque colonies on blood and chocolate agar, and the colonies can be slid around agar surfaces without being disrupted; this is called the "hockey puck sign". One interesting feature of the cellular structure of M. catarrhalis is the presence of trimeric autotransporter adhesins, which are essentially a type of virulence factor. Moraxella is a genus of gram-negative bacteria in the family Moraxellaceae. It is named after the Swiss ophthalmologist Victor Morax. The organisms are short rods, coccobacilli, or as in the case of Moraxella catarrhalis, diplococci in morphology, with asaccharolytic, oxidase -positive, and catalase -positive properties. Catarrhalis forms round opaque colonies on blood and chocolate agar, and the colonies can be slid around agar surfaces without being disrupted; this is called the "hockey puck sign". One interesting feature of the cellular structure of M. catarrhalis is the presence of trimeric autotransporter adhesins, which are essentially a type of virulence factor.