Bacterial pathogens that cause infections in humans have innate characteristic mechanisms with which they use to suppress the immune response of their host in their bid to establish a disease process. Initiation of an infectious process leads to the development of signs and symptoms in the human host, and these syndromes helps to announce the […]
Characteristics of Pathogenic Microorganisms (Bacteria) Read More »
Bacteriology
Inoculum size is defined as the number of invading pathogenic microorganisms that is sufficient enough to initiate an infectious process (i.e. an infection) in a susceptible human host. Pathogens must reach or exceed a particular threshold before they will be able to produce clinical signs which are unique to a given disease process. Normally, the
INOCULUM SIZE OF MICROBES Read More »
Bacteriology
Colony counter is a piece of equipment which is used in the microbiology laboratory to count individual colonies of microorganisms (particularly bacteria and fungi) on solid agar plates. Fully automated colony counters and manually-operated counters are available for the counting of microbes in samples or culture plates. The accurate count of bacterial colonies and cells
Key facts Foodborne botulism is a serious, potentially fatal disease. However, it is relatively rare. It is an intoxication usually caused by ingestion of potent neurotoxins, the botulinum toxins, formed in contaminated foods. Person to person transmission of botulism does not occur. Spores produced by the bacteria Clostridium botulinum are heat-resistant and exist widely in the environment,
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Bacteriology, Food Microbiology, Public Health & Parasitic Diseases (Parasitology)
Glass Plating Beads are reusable beads which helps to spread suspensions of microorganisms (bacteria or fungi) in a culture plate even much more than a conventional spreader. They are applicable when turbid suspensions of microbial cells (fungi or bacteria) are to be spread in an culture plate for such purposes as determination of the colony
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Bacteriology, Techniques in Microbiology Lab
Cholera is an infectious disease that causes severe watery diarrhea, which can lead to dehydration and even death if untreated. It is caused by eating food or drinking water contaminated with a bacterium called Vibrio cholerae. Cholera was prevalent in the U.S. in the 1800s, before modern water and sewage treatment systems eliminated its spread
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Bacteriology
Key facts about Buruli ulcer Buruli ulcer, caused by Mycobacterium ulcerans, is a chronic debilitating disease that affects mainly affects the skin and sometimes bone. The organism belongs to the family of bacteria that causes tuberculosis and leprosy, which provides an opportunity for collaboration with these disease programmes. However, M. ulcerans is an environmental bacterium and produces unique toxin
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Bacteriology
Prokaryotic cells are microbial cells that have chromosomes that are not separated from the cytoplasm by a membrane. Prokaryotic cells are different from eukaryotic cells. They are cells that lack a nucleus and other membrane-enclosed organelles like mitochondrion and chloroplast et cetera. Thus everything inside the cell of a prokaryote is openly accessible within the
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Microbial Physiology & Metabolism, Bacteriology
Axenic animals are laboratory controlled animals that are germ-free i.e. animals that are not contaminated with any microorganisms and are devoid of any microflora. Such animals can also be called Gnotobiotic animals. Gnotobiotic or Axenic animals have tremendous medical research applications. The microflora from axenic animals help scientists to elucidate the relationship that exist between
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Bacteriology, General Microbiology
Inoculation is a microbiology technique which is used to introduce or place specimens and microbial cultures on or into a culture medium. The organism to be transferred into or onto the surface of the culture media (inclusive of solid and liquid or broth media) is known as inoculum. Inoculation is performed in the microbiology laboratory
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Bacteriology, Techniques in Microbiology Lab