Habitat and Morphology of Neisseria gonorrhoeae

Habitat and Morphology of Neisseria gonorrhoeae

Habitat of Neisseria gonorrhoeae Human is only the natural host. Found in human urogenital tract. Rectal carriage in healthy individuals. Typically seen in pus cells (intracellular) Found intracellularly in polymorphonuclear leukocytes, or a specific category of white blood cells with … Read more

Biochemical Test of Neisseria gonorrhoeae

Biochemical Test of Neisseria gonorrhoeae

Biochemical Test of Neisseria gonorrhoeae ­Basic Characteristics Properties ( Neisseria gonorrhoeae) Capsule Negative (-ve) Catalase Positive (+ve) Gas Negative (-ve) Gram Staining Negative (-ve) H2S Negative (-ve) Hemolysis Negative (-ve) Nitrate Reduction Negative (-ve) Oxidase Positive (+ve) Pigment Negative (-ve) … Read more

New York City Agar

New York City Agar

Introduction NYC Agar Base medium was originally developed by Fauer, Weisburd and Wilson at the New York City Department of Health for selective isolation of pathogenic Neisseria species from clinical specimens. NYC medium, primarily designed for isolation of pathogenic Neisseria, also … Read more

Martin Lewis Agar

Martin Lewis Agar

Introduction Thayer-Martin Agar was developed in 1964 for the isolation of N. gonorrhoeae and N. meningitidis. A further modification of these early formulations was developed to improve the isolation of pathogenic Neisseria sp. from specimens, which contained large amounts of … Read more

Modified Thayer Martin Agar

Modified Thayer Martin Agar

Thayer and Martin reported an improvement of the Chocolate Agar formulation that contained antimicrobics vancomycin, colistin and nystatin have been added to minimize overgrowth by contaminants, suppress the growth of saprophytic Neisseria sp., and enhance the growth of pathogenic Neisseria. … Read more

Cystine Tryptic Agar

Cystine Tryptic Agar

Cystine tryptic agar (CTA), also known as cystine trypticase agar, was developed by Vera as a semi-solid growth medium used for the identification and maintenance of microorganisms for extended periods when stored at appropriate temperatures. It is used for the … Read more

Chocolate Agar

Chocolate Agar

Chocolate agar is essentially the same as blood agar except that during preparation the red blood cells are lysed when added to molten agar base. As a result, the cell lysis releases intracellular nutrients such as hemoglobin, hemin (“X” factor), … Read more

32 Differences between Neisseria meningitidis and Neisseria gonorrhoeae

Differences between Neisseria meningitidis and Neisseria gonorrhoeae

Neisseria meningitidis and Neisseria gonorrhoeae, are obligate human pathogens that cause distinctly different disease syndromes. They are both Gram negative diplococci, non-sporing, oxidase positive and difficult to differentiate on morphological and cultural characteristics. However, they can be differentiated on the following grounds: S.N. … Read more