Blog

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…

Animal Contact Outbreak Surveillnace System (CDC). National Outbreak Reporting System (NORS-CDC) PulseNet (CDCs molecular surveillance network for enteric pathogens). Generally Enterobacteriaceae are the largest group of medically important bacteria which comprise…

see also Morphology  Introduction: Bacteria are classified according to 1) morphology 2) gram stain as well as 3) growth requirements. Isolation and identification in Culture is the "gold standard for identification…

Medically Important Gram +  Genus--species Shape Metabolism Diagnosis Symptoms Virulence factors location transmission Therapy Staphylococci cocci clusters facultative anaerobes         beta lactams --S. aureus     alpha…