All bacterial cells are extremely infinitesimal (i.e. microscopic), and are never visible to the naked eyes. Bacteria exist in different sizes and shapes which may range from 0.1 µm to 0.3 µm wide and 1 µm to 10 µm in length depending on whether they are rod or spherical in shape (Figure 1). Bacteria occur […]
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Bacteriology
Bacteria (singular: Bacterium) is one of the two important members of the prokaryotes (i.e. cells in which the chromosomes are not separated from the cytoplasmic membrane). The second is Archaea. Bacteria are prokaryotic organisms with very simple cell structure. They are single-celled organisms with complex cell wall. Bacterial cells are the simplest possible forms of
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Bacteriology
Archaea bacteria generally inhabit terrestrial and aquatic environments where the condition of living is extremely harsh and unfavourable for other microbial cells. Habitats occupied by Archaea have very high temperature and salinity. Archaea are known to live in hostile environments including hot springs and areas with high salt concentration. They are not known to cause
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Microbial Taxonomy
The phylogenetic tree of life comprises mainly of Eubacteria, Archaea and Bacteria. Eubacteria or Eukarya, Archaea and Bacteria are the three primary groups of microorganisms and macroorganisms, and these are generally referred to as domains- which show the ancestry of these organisms according to phylogeny. Phylogeny is the branch of science that studies the evolutionary
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Microbial Taxonomy
There are millions of microorganisms in the face of the planet earth, and these organisms are ubiquitously distributed. To make sense of the diversity of microorganisms around us in terms of their types or varieties, it is important to group microbes together according to some similarities and features that exist amongst them. This is the
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Microbial Taxonomy
Bacillus cereus Gram-positive rods Motile organism Forms endospores Colonies are non-haemolytic on blood agar Aerobic & facultative organism Bacillus anthracis Gram-positive (or Gram-variable) bacillus Non-motile organism Form spores, & are capsulated Aerobic & facultative anaerobe Bacillus stearothermophilus Gram-positive rods Motile organism Forms endospores Aerobic & facultative organism Has the ability to grow at temperatures of
LIST OF SOME BACTERIA OF MEDICAL IMPORTANCE AND THEIR FEATURES Read More »
Bacteriology
Bacteriology is simply defined as the scientific study of bacteria. Pathogenic bacteriology thus, is the scientific study of bacteria that cause diseases in man. This unit which is one of the most important units of the clinical microbiology laboratory handles different types of patient’s specimens, with the sole aim of growing and isolating pathogenic bacteria
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Bacteriology
Medical Bacteriologyis a branch of medical microbiology that is concerned with the diagnosis, prevention and treatment of infectious diseases caused by bacterial pathogens. It is simply the study of bacteria that are of medical importance i.e. that cause diseases in human beings and animals. Medical bacteriology is the study of the interactions between pathogenic bacteria
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Bacteriology, General Microbiology, Medical Microbiology