This is a magnified view of an Arabidopsis thaliana leaf eight days after being infected with the pathogen Hyaloperonospora arabidopsidis, which is closely related to crop pathogens that cause 'downy mildew' diseases. It is also more distantly related to the agent that caused the Irish potato fa... Read More
Shiga toxin is an extremely potent toxin that is produced when the bacterium contains a bacteriophage carrying the toxin gene. It is closely linked with Haemolytic Uraemic Syndrome and acute renal failure in children. After ingestion via contaminated food or water the E. coli bacteria colonize t... Read More
An electron micrograph depicts the Trichomonas vaginalis parasite adhering to vaginal epithelial cells collected from vaginal swabs. A non-adhered parasite (right) is pear-shaped, whereas the attached parasite is flat and amoeboid.
Credit: Image courtesy of: Antonio Pereira-Neves and Marlene... Read More
Safranin-stained Micrococcus luteus showing sarcinae and other arrangements. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
This photomicrograph depicts a Treponema pallidum bacterium, a spirochete 5 - 15 micrometers in length, which is the causative agent of syphilis.
Syphilis, is passed from person to person through direct contact with a syphilis sore. Sores occur mainly on the external genitals, vagina, anus, or ... Read More
By adding some art to his “Fundamentals of Microbiology” science course at the University of Waterloo, Biology professor Josh Neufeld has found a way to engage his students with the topic in a fun and creative way.
BIOL 140, explains Neufeld, is a large introductory course divided across thre... Read More
Pigmented and non-pigmented parts of Serratia marcescens colonies. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Image of Streptococcus, a type (genus) of spherical bacteria that can colonize the throat and back of the mouth. Stroptococci often occur in pairs or in chains, as shown here.
Tina Carvalho, University of Hawaii at Manoa Read More
Gram-negative rods, possibly E. coli. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
The results after incubation of a blood agar plate exposed to a laboratory environment for approximately 2 hrs. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Borrelia burgdorferi is a spirochete, a class of long, slender bacteria that typically take on a coiled shape. Infection with this bacterium causes Lyme disease.
Credit: Tina Carvalho, University of Hawaii at Manoa, NIGMS photo gallery
A colour-enhanced scanning electron micrograph image showing a cluster of Clostridium difficile on a surface. Clostridium difficile is a species of Gram-positive bacteria that causes severe diarrhea and other intestinal disease when competing bacteria in the gut flora have been wiped out by anti... Read More
Under a magnification of 3841X, this scanning electron micrograph SEM) revealed some of the ultrastructural morphologic details exhibited by a number of Gram-positive bacilli, or “rod-shaped”, Mycobacterium fortuitum bacteria.
M. fortuitum is classified as a “rapidly-growing” Mycobacterium, ... Read More
One of many varieties of colorful lichens that grow on Ocotillo along the coast of Baja, Calif.
Lichens are actually made up of two plants: an algae and a fungus, living in a symbiotic relationship. In desert environments, lichen will dry out completely and remain dormant until rain or dewfal... Read More
Cell showing overproduction of the ARTS protein (red). ARTS triggers apoptosis, as shown by the activation of caspase-3 (green) a key tool in the cell's destruction. The nucleus is shown in blue.
Sarit Larisch and Hermann Steller, Rockefeller University Read More
Snottites have captivated cave-goers and scientists alike since the earliest publication on cave microbes by Hoeg in 1946. These biofilms cover the walls with a thick snot-like film, from which they derive their particularly appropriate name. A variety of cave systems, the Frasassi caves in Ital... Read More
Winner from the 2008 Science and Engineering Visualization Challenge presented in the Sept. 26, 2008 issue of Science.
The winning photography entry, "Glass Forest," depicts at the microscale level a community of diatoms, unicellular algae characterized by a peculiar glass-like cell wall, att... Read More
This sculpture made of purple and clear glass beads depicts bacteriophage Phi174, a virus that infects bacteria. It rests on a surface that portrays an adaptive landscape, a conceptual visualization. The ridges represent the gene combinations associated with the greatest fitness levels of the vi... Read More
Irregular, concentric, undulate, opaque colonies on the surface of a nutrient agar plate. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More