Enteric bacteria are those bacteria that are present in the intestine. They belong to family Enterobacteriacea. They are gram negative rods, oxidase positive, catalase positive, non-spore former, can grow in the presence of bile salts, they are facultative anaerobes. They can either motile or non-motile. They have similar characteristics. The family enterobacteriacea includes Escherichia coli … Read more
Anaerobic bacteria are those bacteria that cannot survive in the presence of oxygen Examples: Clostridium, Propionibacterium and Actinomycetes etc. Classification: There are three types of anaerobic bacteria. Obligate anaerobes: Obligate aerobes can’t survive in the presence of oxygen. They immediately die if oxygen is present in their environment. They don’t have catalase and superoxide dismutase … Read more
Fastidious Bacteria| From the Perspective of Microbiologist: The word ‘fastidious’ is taken from fastidiousness, meaning difficult to grow. The intent of the article is to provide readers with information about the general characteristics of fastidious bacteria. So, let’s start. What are fastidious bacteria? Bacteria are classified differently based on many factors. An example includes aerobic … Read more
Mycoplasmas are the smallest known bacteria also called as Mollicutes. Mollicutes is derived from two Latin words Mollis and cutes meaning soft body. Mycoplasmas don’t have cell wall, they are wall less bacteria. Their size ranges from to equal to the size of Pox virus. Their key feature is absence of cell wall and due … Read more
Introduction Mycoplasma hominis are obligate parasites. They are dependent on external cholesterol source for the synthesis of their plasma membrane. So they need their host for the synthesis of plasma membrane and growth. They are dependent on host for getting most of their compounds. They require especial growth requirements and hence special media for their … Read more
Mycoplasmas are the smallest known bacteria also called as Mollicutes. Mollicutes is derived from two Latin words Mollis and cutes meaning soft body. Mycoplasmas don’t have cell wall, they are wall less bacteria. Their size ranges from to equal to the size of Pox virus. Their key feature is absence of cell wall and due … Read more
Mycoplasmas are the smallest known bacteria also called as Mollicutes. Mollicutes is derived from two Latin words Mollis and cutes meaning soft body. Mycoplasmas don’t have cell wall, they are wall less bacteria. Their size ranges from to equal to the size of Pox virus. Their key feature is absence of cell wall and due … Read more
Ever experienced food poisoning after eating some reheated fried rice, the reason may be this naughty microorganism’s entry into your gastrointestinal tract. Bacillus Cereus, not the only one but is one of the leading causes of food poisoning. Bacillus Cereus is an aerobic, motile and facultative anaerobe which also shows the property of beta hemolysis. The … Read more
It is used for centrifugation Principle: Separate molecule on the basis of size and density. If size decrease it required high centrifugation The method in which we increase gravity by increasing rotation the increase in the centrifugal force Relative Centrifugal Force/RPM: Gravity produced in centrifuge is RCF. The speed at which centrifuge machine rotate if … Read more
Spectrophotometer It an instrument which is used to measure optical density (O.D), concentration by using light, to determine conc. of solute in a solution Spectron splits the light into different wavelengths. On basis of conc. And path length light is absorbed. Principle Its principle is based on Beer and Lambert Law which is followings; Absorbance … Read more