throat culture on blood agar and tellurite medium. black colonies on tellurite medium are Corynebacterium diphtheriae Read More
Blastomyces dermatitidis. Yeast stage from 2-day culture on blood agar at 37 . Note double refractile cell wall Read More
. . . to do YOUR part to help stamp out what are now called STI's. Funny how as our knowledge of STI's and our ability to treat them has bloomed, our societal level of comfort with such PSAs seems to have withered. I used to see cleverly designed (and carefully/antiseptically couched) PSAs ab... Read More
Entomophthora coronata in tissue. Splendore-Hoeppli effect. H & E stain (450X) Read More
Electron micrograph of one cell of Proteus vulgaris with numerous flagella Read More
Blood agar culture of sputum from patient with pneumonia. Comprimised host. Colonies of Candida albicans and pseudomonas aeruginosa Read More
Coxsackie viruses. Coloured transmission electron micrograph (TEM) of a group of Coxsackie viruses. These viruses were named after the town in the USA where they were isolated. They are entero- viruses, part of the Picornaviridae group. This group contains small, non-enveloped, icosahedral- shap... Read More
Colorized scanning electron micrograph of malaria (Plasmodium yoelii nigeriensis) oocysts ( thick-walled structure in which sporozoan zygotes develop) developing on the midgut wall of the mosquito Anopheles.
Credit: Hilary Hurd, Wellcome Images Read More
Gram-negative rods, possibly E. coli. (approx. 1000 X). Taken from the Wistreich Collection. Read More
Under a low magnification of 5X, this photograph depicted a number of Legionella pneumophila colonies that had been cultivated on Feeley-Gorman (FG) agar. Note the “cut-glass” appearance displayed by the round, off-white colored colonies. FG agar is used particularly in the cultivation of Legion... Read More
Saints preserve us from this one. A highly contagious hemorrhagic fever, Marburg is less well known that it's cousin Ebola, (they're both members of the deeply troublesome Filovirus family) but no less deadly.
Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections are caused primarily by a single strain—USA300—of an evolving bacterium that has spread with “extraordinary transmissibility” throughout the United States during the past five years, according to a new study le... Read More
"Two types of bacteria found in the soil have enabled scientists to get the dirt on how resistance to antibiotics develops along with a separate survival strategy.The study identifies an atypical antibiotic molecule and the way in which the resistance to that molecule arises, including the ident... Read More
In a healthy adult human body, most internal organs such as the brain, spleen, liver, and heart are devoid of microorganisms because the immune system keeps them in check. After human host death, however, the immune system falters and microorganisms proliferate throughout the body beginning in ... Read More
The Small Things Considered blog has a post by Fred Neidhardt, F.G. Novy Distinguished University Professor, Emeritus, Department of Microbiology and Immunology, University of Michigan Medical School at Ann Arbor, that looks at two photos snapped by 19-year-old Casey Gutteridge at the Santago Ra... Read More
Stained using a fluorescent antibody (FA) technique, this photomicrograph revealed a positive result for this stained serum specimen from a suspected rubella patient.
Rubella virus is classified as a togavirus, genus Rubivirus. It is most closely related to group A arboviruses, such as easter... Read More
Acid Fast stain done on a mix of Staphylococcus aureus and Mycobacterium smegmatis. The stain was done on a culture of M. smegmatis that was incubated on a TSA slant with 1ml TSB added at 37 degree's C for 4 days, S. aureus was incubated in TSB at 37 degree's C for 24 hrs. Several loops of eac... Read More
Serratia marcescens can form brilliant red colonies on LB agar due to the synthesis of the secondary metabolite prodigiosin. In the Microbiology teaching lab, we had students create pigment mutants of S. marcescens and these lovely shades of pink and white were collected for analysis. Read More