Scientists are one step closer to understanding how a normally harmless fungus changes to become a deadly infectious agent. Read More
Nocardia asteroides isolation from blood specimen. On culture, chalky white colonies were seen on blood agar. Image courtesy MicrobeWorld user Kyriakos Zaragkoulias, Specialty Registrar (StR) in Medical Microbiology at General Hospital of Thessaloniki “G. Papanikolaou”, Greece.
Illustration of sites of embryonated egg inoculation Read More
Bacteroides fragilis colonies on blood agar (1:5) Read More
Three organisms inoculated onto blood agar, straight line inoculation, to demonstrate hemolysis. From top to bottom:
Streptococcus pyogenes: beta, complete lysis of red blood cells, clear area around colony growth.
Streptococcus bovis: alpha, incomplete lysis of red blood cells, green area ... Read More
Marine bioluminescent Photobacterium kishitanii
The genus Photobacterium was first coined by Martin Beijerinck, in 1889, and originally referred to all bacteria capable of light production. Species belonging to Photobacterium are gram negative, rod shaped, chemoorganotrophic, facultative aerob... Read More
My wife Jennifer Quinn hits it out the park: a portrait of Kenneth Nealson and the late Woody Hastings "painted" with luminous bacteria, giving them props for the early days of quorum sensing---where the basic principles were first uncovered in bioluminescent microbes. This principle of "aut... Read More
Phytoplankton may be microscopic, but that doesn’t mean we can’t see them. Just look up: These little critters are brightening up cloudy days around the world. Read More
Swarm of paramecia surrounding an unidentified protozoan. Taken from the Wistreich Collection. Read More
Isolated colony of Mycobacterium smegmatis grown on TSA for 96 hrs at 37 degrees C. Margin is lobate with an irregular-rhizoid form. Image taken using transmitted light. Read More
Infected guinea pig eye Shigella - Sereny test Read More
In this blog entry, I explore how students can use their creativity to learn microbiology in innovative and often artistic ways. It makes learning more personal! Read More
Prions are fascinating, enigmatic, and might teach us not only about rare prion diseases like Creutzfeld-Jakob disease, mad cow disease, or scrapie, but also about other more common neurodgenerative diseases. Two studies published on July 2nd in PLOS Pathogens report progress with novel tools an... Read More
Smallpox is a serious, highly contagious, and sometimes fatal infectious viral disease. There is no specific treatment for smallpox disease, and the only prevention is a smallpox vaccination. Read More
Remember SARS? Or the last time you had a nasty cold? Lay your troubles at this bad-boy's door.
In fact, SARS-CoV - the Corona variant that causes SARS - has the rather unique quality of causing both upper & lower respiratory infections, and gastroenteritis.
Note as well that the Coronavi... Read More
New research shows that epidemics of dengue—caused by a mosquito-borne virus—across southeast Asia appear to be linked to the abnormally high temperatures brought by the El Niño weather phenomenon. Read More
The discovery of bi-allelic mutations in RORC in patients with candidiasis and mycobacteriosis revealed the pivotal role of RORC in mucocutaneous immunity to Candida and in systemic immunity to Mycobacterium in humans. Read More
“Predator” bacteria (green) surround “prey” bacteria (red) in this petri dish version of the Serengeti. Rather than eating their prey, however, predator cells release a chemical that activates a suicide gene in the prey. Prey cells also release a chemical, but one that promotes survival of the p... Read More