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
Hand print on a large TSA plate from my 8 1/2 year old son after playing outside. Read More
Gram-stained Staphylococcus aureus. (approx. X 1000). taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Under a high magnification of 21930x, this scanning electron micrograph (SEM) depicted some of the ultrastructural morphologic features displayed by this group of Gram-positive Micrococcus luteus bacteria. The specimen was obtained from a pure culture that was raised on a polycarbonate filter, f... Read More
Nikon's Small World 2012 Photomicrography Competition
Dr. Diana Lipscomb
George Washington University
Department of Biological Sciences
Washington, District of Columbia, USA
Sonderia sp. (a ciliate that preys upon various algae, diatoms, and cyanobacteria) (400x)
Tec... Read More
The Gram-positive bacteria Staphylococcus epidermidis and Staphylococcus aureus are the most common pathogens in hospital-acquired infections. The costs related to infections caused by these strains in the hospital setting are enormous and represent a major healthcare burden. Furthermore, the mo... Read More
This photograph depicts the colonial morphology displayed by Gram-negative Haemophilus influenzae bacteria, which was grown on a medium of chocolate agar, for a 24 hour time period, at a temperature of 37°C.
Invasive disease caused by Haemophilus influenza type-b can affect many organ systems... Read More
This scanning electron micrograph revealed the presence of the human immunodeficiency virus (HIV-1), (spherical in appearance), which had been co-cultivated with human lymphocytes. Note the lymphocyte in the lower left, and some of its extended pseudopodia. HIV-1 virions can be seen on the surfa... Read More
An important question about the retrovirus XMRV, which has been implicated in prostate cancer and chronic fatigue syndrome, is where the virus replicates in humans. Such information would provide clues about how infection might be transmitted. To date the virus has been detected in malignant pro... Read More
Simple stain- single human cheek cell with bacteria covering its surface (approx. X 100). Taken from the Wistreich Collection, appearing exclusively in MicrobeWorld. Read More
Tissue specimen showing spirochete (Treponema pallidum) (970X). Taken from the Wistriech Collection, appearing exclusively on MicrobeWorld. Read More
This poster has ten (10) mildly interesting facts about antibiotics, just in case you needed a poster or handout for Antibiotic Awareness Week (Nov 18-24, 2013). You can download PDF at "source" URL, above. Please feel free to share this graphic with your students, classmates, colleagues, frien... Read More
This is a live image of the of Diatom Arachnoidiscus under 40x magnification. The picture shows the diatom's silicified cell wall, which forms a pillbox-like shell (frustule) composed of overlapping halves that contain intricate and delicate markings. The picture was obtained with new video enha... Read More
Colorized scanning electron micrograph of rust on a rose leaf. Rose rust is a disease specific to roses and is caused by the parasitic fungus Phragmidium tuberculatum and some other closely related species. This disease occurs during spring and persists until the leaves fall. This images shows r... Read More
Gram-negative rods –Pseudomonas aeruginosa species (approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Photomicrograph of Chlamydia grown in culture. The sample was taken from rhesus monkey kidney cells and stained with giemsa. The cell nuclei appear red and the infective 'elementary bodies' of the Chlamydia, which develop in 'blisters' in the cells, fluoresce green. Chlamydia is a very common se... Read More
See those round, fuzz-ball looking things? You're seeing Lassa fever, up close & personal courtesy of a TEM microscope.
Another of those fearsome hemorrhagic fevers, Lassa virus is a member of the Arenaviridae family.
If you learn nothing more about Lassa fever, learn about Aniru Conteh.
F... Read More