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The results of a pour plate after incubation

The results of a pour plate after incubation. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Arsenic Tolerant Plant

The sporophyte of the fern Pteris vittata, which tolerates and accumulates very high levels of the deadly toxin arsenic. Researchers from Purdue University have identified a gene (ACR3) from P. vittata that is necessary for the plant's tolerance to arsenic.

Jody Banks, professor of botany an... Read More

Pellicle on the surface of a broth medium

The presence of a pellicle on the surface of a broth medium. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Blood Agar Plate

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

USA300 strain of S. aureus

The USA300 strain of Staphylococcus aureus bacteria, colorized in gold, shown outside a white blood cell.

Staphylococcus aureus: USA:300 is a strain of gram-positive coccus bacteria responsible for Methicillin-resistant Staphylococcus aureus (MRSA), or Staph infection in humans. This strain ... Read More

Rotavirus

Note the wheel-like appearance of some of the rotavirus particles. The observance of such particles gave the virus its name ('rota' being the Latin word meaning wheel). Bar = 100 nanometers. Rotaviruses are nonenveloped, double-shelled viruses, making the virus stable in the environment.

Phot... Read More

Microbiology art gallery for engaging large classes

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

Coloured TEM of a group of Coxsackie viruses

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

Virions of a hantavirus known as the Sin Nombre virus (SNV).

This transmission electron micrograph (TEM) revealed the ultrastructural appearance of a number of virus particles, or “virions”, of a hantavirus known as the Sin Nombre virus (SNV).

In November 1993, the specific hantavirus that caused the Four Corners outbreak was isolated. Using tissue fro... Read More

Micrococcus lutea

Gram-stain of Micrococcus lutea. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Micrococcus luteus

Safranin-stained Micrococcus luteus showing sarcinae and other arrangements. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Mycobacterium fortuitum

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

Acid-fast rods

Acid-fast rods. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Trichomonas vaginalis Parasite

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

Non-acid-fast rods

Non-acid-fast rods. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Gram-stained preparation of Bacillus subtilis

Gram-stained preparation of Bacillus subtilis showing rods, and spores (empty areas). (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Entamoeba

Entamoeba, an amoeba that includes pathogens of the intestinal tracts of a range of hosts - humans are included. They have no mitochondria and seem to have adapted secondarily to an anoxic way of life. Cytoplasm of a thick and dense consistency, and like that of pelobionts (to which we think the... Read More

Viruses in Yellowstone

Viruses are not usually regarded as living cells. A virus 'particle' requires a living host cell in order to reproduce. Although we usually think of viruses as causing diseases, they also are an integral part of natural ecosystems controlling the size of bacterial populations by preying on them.... Read More

Gram-negative rods

Gram-negative rods, possibly E. coli. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Salmonella typhi.

Flagella stain of Salmonella typhi. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
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