The Esculin hydrolysis test is a biochemical test which is used for the identification and differentiation of certain bacteria, mainly Enterococcus species and Group D streptococci from other streptococci. It is also used for identifying some other organisms such as Listeria species and members of Bacteroides fragilis group. It is based on the ability of … Read more
It is a biochemical test used in microbiology for the identification of Streptococcus pneumoniae from other alpha hemolytic streptococci. It is mainly based on the ability of pneumococcal cells to undergo lysis in presence of bile salts. This test is commonly performed in diagnostic laboratories for confirmation of pneumococcal isolates. It is the process in … Read more
Leucine aminopeptidase (LAP) is an enzyme used to distinguish catalase-negative, gram-positive cocci of Aerococcus and Leuconostoc (LAP test negative) from other organisms in the group, such as Streptococcus, Enterococcus, Lactococcus, and Pediococcus (almost always positive).
It is a biochemical test that is used to determine the ability of microorganism to produce and secrete the enzyme lipase. It is also referred to as lipase test. The complex lipids such as triglycerides are large molecules and these cannot pass through the bacterial cell membrane. Due to this reason some bacteria releases the … Read more
What is replicative transposition? Replicative transposition is a type of transposition in which the transposable element is duplicated during its movement from one site to another. It is the process where the original transposable element remains at the donor site and a new copy is inserted into the target DNA. This is referred to as … Read more
What is Euglena? Euglena is a unicellular microscopic organism which belongs to the group of protists and it shows the characteristics of both plant and animal. It is generally found in fresh water bodies like ponds lakes and marshy places. It is a eukaryotic organism and the cell contains nucleus and other membrane bound organelles. … Read more
What is Cyclops? Cyclops is a genus of small freshwater crustaceans which belongs to the subclass Copepoda. It is commonly referred to as water flea due to its small size and free swimming nature. It is named after the one-eyed giants of Greek mythology as a single median eye is present at the centre of … Read more
Ouchterlony Double Immunodiffusion Method is a qualitative immunological technique that is used to study antigen–antibody reaction in vitro. It is the process in which both antigen and antibody are allowed to diffuse freely in a semi-solid medium usually agar or agarose gel. This method was developed by Örjan Ouchterlony and it is commonly used for … Read more
Mumps virus (MuV) is the causative agent of the acute infectious disease known as mumps. It is scientifically classified as Orthorubulavirus parotitidis and belongs to the family Paramyxoviridae. It is an enveloped virus having single-stranded negative sense RNA genome and the viral particle is pleomorphic in nature with size ranging from about 100–600 nm. Humans … Read more
The Arneth count is a hematological method used for the classification of neutrophils based on the number of lobes present in the nucleus. It is the process in which neutrophils are grouped into different classes according to nuclear segmentation and this helps in understanding the age and functional status of the cells. In this method … Read more
