microbiology

Introduction: Legionella pneumophila is an intracellular gram-negative bacillus that causes acue febrile pneumonia (Legionnaires' disease). Legionella is composed of 48 different species and 70 different serotypes, although L. pneumophila accounts for the vast majority…

See also Enterobacteriaceae  Clinically relevant Gram-negative bacteria include Salmonella, Shigella, Escherichia, Klebsiella, Enterobacter, Seratia, Proteus, Morganella, Providencia, yersinia, Neisseria, Moraxella (Branhamella), the Acinetobacter and other less common genera.  Gram-negative bacillis…

Companies: TB Alliance  Tuberculosis (TB), caused by members of the Mycobacterium tuberculosis complex, is one of the most common human infectious diseases, causing three million deaths a year world-wide. While the disease…

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

Streptococcus pyogenes (Group A Streptococcu)s is the etiologic agent responsible for many conditions related to streptococcal infections. It is more commonly known as Group A Strep and has more than 6,000…

Staphytlococcus aureus (S. aureus) is the most virulent Staphylococcus species and causes a variety of infections in humans, both localized and systemic. Most commonly, S. aureus causes a localized skin infection…

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…

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. Human…

Gram positive bacteria are a diverse group. The most clinically important gram ositive pathogens include Staphylococcus, Streptococcus and Entercocci.  Gram-positive cocci Enterococcus: are gram positive cocci to elongated cocci in single…

Microbiologists have differentiated bacterial based on their biochemical diversity using various biochemical tests. Such tests often include differential medial which are artificial mixtures of chemicals and organic substrates intended to…