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Companies: TB Alliance Websites: TB knowledge sharing platform (guidelines and operational handbook) Introduction/Definitions: The genus Mycobacterium consists of about 100 species, including pathogens and saprophytes, and may be divided into three…

Introdcution to Upper Respiratory Tract Diseases casued by S. pyogenes The most serious cases of pharyngitis (inflammation of the throat) are caused by Streptococcus pyogenes, a group A streptococcus. S.…

See also Scarlet Fever Introduction: Streptococcus pyogenes (Group A Streptococcus) is is the etiologic agent responsible for many conditions related to streptococcal infections. It is more commonly known as Group A…

FDA Bacteriological Analytical Manual (FDA's Bacteriological Analytical Manual (BAM) presents the agency's preferred laboratory procedures for microbiological analyses of foods and cosmetics.) Introduction: Staphytlococcus aureus (S. aureus) is the most virulent…

USDA (food safety) Introduction The genus Clostridium is comprised of gram-positive, anaerobic, spore-forming bacilli. The natural habitat of these organisms is the environment and the interstinal tracts of humans and other…

Introduction: Bacillus anthracis is a spore-forming bacterium that causes anthrax in humans and animals. It is a zoonaotic disease in that it is normally transmitted by handling of animal carcases.…

Notifiable Diseases in the US (Wikipedia) Gram positive bacteria are a diverse group. The most clinically important gram ositive pathogens include Staphylococcus, Streptococcus and Entercocci. Gram-positive cocci Enterococcus: Enterococcus refers to…

Differential Tests for Enterobacteriaceae   See right hand panel Motility Tests: See outline Introduction: Microbiologists have differentiated bacterial based on their biochemical diversity using various biochemical tests. Such tests often include…

See also Differential Tests Selective media, generally Selective media can be used to inhibit unwanted bacterial and thereby differentiate bacterial types. Media for isolating intestinal pathogens (MacConkey agar, Hektoen enteric…

See also Bacterial structure Bacteria have various appendages for motility (flagella and axial filaments).  The primary function of flagella is to confer motility or sel propulsion. Motility is a piee…