Biochemical Test of Bacteria Biochemical reactions are very important in the identification of bacterial isolates and in the identification of different bacterial species. These tests depend on the presence of certain enzymes, such as catalase, oxidase, urease, gelatinase, etc., produced by the bacteria. Different bacteria produce varying spectra of enzymes. For example, some enzymes are … Read more Biochemical Test of Bacteria
Fluorescence Microscope from LEAM Solution Inc About LEAM Solution LEAM Solution Inc. are innovators producing applicable microscope equipment using already existing microscopes in the market. Ten years ago, LE.AM Solution Inc. dived into the microscope market by selling low-priced microscopes and services. Back then, they were merely a small technology-related startup company as they had … Read more Fluorescence Microscope from LEAM Solution Inc
Field Trials Experimental studies set out to alter, rather than just observe, relevant exposures of interest, and to assess over time their impact on health status or disease outcomes. The field trial is the one such type of interventional study designed to evaluate prevention strategies. They are studies carried out “on the ground” or “on the … Read more Field Trials
Salt Tolerance Test Objectives To determine the ability of an organism to grow in high concentrations of salt. It is used for the differentiation of Enterococci from Non-Enterococci. Principle Salt acts as a selective agent and interferes with membrane permeability and osmotic equilibrium. The salt tolerance medium is a selective and differential medium in which … Read more Salt Tolerance Test
Kligler Iron Agar Test Objective To differentiate the enteric gram-negative bacilli based on the production of hydrogen sulfide and fermentation of dextrose and lactose. Principle Kligler Iron Agar (KIA) test is used in differentiating certain members of the Enterobacteriaceae by demonstrating hydrogen sulfide production and the fermentation of dextrose and lactose. Kligler agar used for … Read more Kligler Iron Agar Test
Passive Transport Plasma membranes must allow certain substances to enter and leave a cell, and prevent some harmful materials from entering and some essential materials from leaving. In other words, plasma membranes are selectively permeable—they allow some substances to pass through, but not others. If they were to lose this selectivity, the cell would no longer … Read more Passive Transport
Membrane Proteins Biological membranes consist of a continuous double layer of lipid molecules in which membrane proteins are embedded. Although the lipid bilayer provides the basic structure of biological membranes, the membrane proteins perform most of the membrane’s specific tasks and therefore give each type of cell membrane its characteristic functional properties. The amounts and … Read more Membrane Proteins
Biochemical Test of Fusobacterium necrophorum Image Source: Microbe-Canvas Some of the characteristics are as follows: Basic Characteristics Properties (Fusobacterium necrophorum) Bile Growth Variable Capsule Negative (-ve) Catalase Negative (-ve) Flagella Negative (-ve) Gas Positive (+ve) Gelatin Hydrolysis Variable Gram Staining Gram-negative bacteria H2S Positive (+ve) Hemolysis Positive (+ve) (alpha- and beta-hemolysis may be observed) Indole … Read more Biochemical Test of Fusobacterium necrophorum
Biochemical Test of Aeromonas hydrophila Image Source: Wikipedia Some of the characteristics are as follows: Basic Characteristics Properties (Aeromonas hydrophila) Capsule -ve Catalase +ve Citrate +ve Flagella +ve Gas +ve Gelatin Hydrolysis +ve Gram Staining Gram-negative H2S +ve Hemolysis +ve Indole +ve Maximum Growth Temperature 41°C Motility +ve Nitrate Reduction +ve OF (Oxidative-Fermentative) Fermentative Oxidase … Read more Biochemical Test of Aeromonas hydrophila
Predictive Value There are arguably two kinds of tests used for assessing people’s health: diagnostic tests and screening tests. screening tests typically have advantages over diagnostic tests such as placing fewer demands on the healthcare system and being more accessible as well as less invasive, less dangerous, less expensive, less time-consuming, and less physically and … Read more Predictive Value