Knowra Microbiology Microbiology Microbiology is the scientific study of microorganisms, including bacteria, archaea, viruses, fungi, microscopic algae, and protozoa. It investigates their biology, evolution, interactions, and effects on humans and environments.
Microorganism : An organism or biological agent too small to be seen clearly without magnification. Microbiology centers on microscopic entities, though definitions differ on whether viruses are organisms.
Bacterial cell structure : The organization of a bacterial cell, including its membrane, cytoplasm, ribosomes, and usually a cell wall. Cell envelopes and internal components shape bacterial survival, identification, and susceptibility to treatment.
Medical microbiology : The study of microorganisms that cause human disease and their diagnosis, prevention, and treatment. It applies microbial knowledge directly to infections and clinical care.
Antonie van Leeuwenhoek : A Dutch scientist who made influential early observations of microorganisms using handcrafted microscopes. His seventeenth-century observations provided some of the first detailed descriptions of microbes.
Unculturable microorganisms : Microorganisms that have not been successfully grown under available laboratory conditions. Many environmental microbes remain difficult to study using culture-dependent methods alone.
Cell theory : The principle that cells are the basic units of life and that cells arise from existing cells. It frames the study of cellular microbes while highlighting viruses’ lack of cellular structure.
Microbial growth : An increase in microbial population size through cell division or replication. Growth patterns help explain how microbes spread, persist, and respond to changing conditions.
Antimicrobial resistance : The ability of microorganisms to survive exposure to medicines that would normally inhibit or kill them. Microbiology tracks how resistance emerges, spreads, and limits effective treatment.
Louis Pasteur : A French chemist and microbiologist known for work on fermentation, vaccination, and microbial disease. His experiments challenged spontaneous generation and connected microbes to fermentation and infection.
Microbial dark matter : Microbial lineages known mainly from genetic sequences rather than cultured representatives. Sequencing reveals extensive diversity whose physiology and ecological roles remain poorly characterized.
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