If the laboratory is not able to identify group-B streptococci (GBS) by the Lancefield grouping procedure, there are other microbiologic tests that can be used to identify GBS. This picture shows one of these tests. It is called the CAMP test. CAMP is an acronym for the authors of this test (Chr... Read More
Aspergillus fumigatus. Typical dichotomous branching of hyphae in pulmonary lesion of a horse. PAS stain Read More
View an interactive animation of the life cycle of the malaria parasite, of the genus Plasmodium. The lifecycle of the malaria parasite is split between female mosquitoes and humans. In the mosquito gut, the parasites complete sexual reproduction and then multiply rapidly to produce many more p... Read More
Eggs of Hymenolepis diminuta. These eggs are round or slightly oval, size 70 - 85 µm X 60 - 80 µm, with a striated outer membrane and a thin inner membrane. The space between the membranes is smooth or faintly granular. The oncosphere has six hooks. There are no polar filaments extending into... Read More
Color-enhanced scanning electron micrograph showing Salmonella typhimurium (red) invading cultured human cells.
Salmonella is actually a group of bacteria that can cause diarrheal illness in humans. They are microscopic living creatures that pass from the feces of people or animals to other p... Read More
Escherichia coli use long, whip-like structures called flagella to propel themselves. Motors in the cell's wall spin the flagella into bundles that rotate counter-clockwise, creating a twist that causes the bacterium to rotate clockwise, or towards the right when viewed from above.
Insight in... Read More
Scanning electron microscopy photograph of a human isolate of Naegleria fowleri amoeba grown in axenic culture displaying sucker-like structures, called amoebastome, used for a novel form of phagocytosis. There appears to be an inverse correlation between the mean number of suckers per amoeba an... Read More
Gram-negative rods and coccobacilli. (Proteus vulgaris) (approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Simple safranin stain of B. subtilis and central location of unstained spores. (Approx. original X 1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Did you know that your body is home to 10 times more microbes than human cells? Join us at ASM Headquarters on Thursday, July 19, 2012, from 6-8 PM to learn about the human microbiome and its fascinating practical applications. Come mingle with like-minded enthusiasts and curious citizens ove... Read More
This 2005 scanning electron micrograph (SEM) depicted numerous clumps of methicillin-resistant Staphylococcus aureus bacteria, commonly referred to by the acronym, MRSA; Magnified 2381x.
Recently recognized outbreaks, or clusters of MRSA in community settings have been associated with strains... Read More
b324-1 clostridium ramosum, peptostreptococcus spp, peptococcus spp and bacteroides fragilis Read More
Conidial head of Aspergillus restrictus, sterigma on vesicle bear spores Read More
I created these two plate cultures for a "most popular" photo scholarship contest on the web and amazingly I have received a nice popularity score thus far. The plates are of Eosin Methylene Blue Agar media with Escherichia coli as the stem and leaves and Salmonella paratyphi as the petels. If... Read More
At the Harvard Virology Program Retreat for 2011, the students ran a viral dessert contest. I posted some of the images at VirusTalk. Have a look at them – they are truly delicious. Read More
erysipelothrix rhusiopathiae. gram stain of 36 hour thioglycolate broth culture (1000x) Read More
A toxin-producing cyanobacteria with natural chlorophyll fluorescence (red) and DNA stain (green).
Location: Orlando, FL, USA
Photographer: Barry Rosen, , U.S. Geological Survey Read More
This tropical scene, reminiscent of a postcard from Key West, is actually a petri dish containing an artistic arrangement of genetically engineered bacteria. The image showcases eight of the fluorescent proteins created in the laboratory of Roger Y. Tsien, a cell biologist at the University of C... Read More