MicrobeWorld

Irregular, concentric, undulate, opaque colonies on the surface of a nutrient agar plate. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

The appearance of circular, entire, opaque colonies on the surface of a nutrient agar plate. 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

A contaminant (mold mycelium) on a Serratia streak plate. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Virus-bacterium associations were examined in the natural environment of a termite's hindgut. Three general scenarios were seen. In the first (1) there was a one-to-one association: one type of virus matched one type of bacterium host. In the second (2) the host bacterium was associated wi... Read More

A close-up of the surface of a streak plate using a mixed culture of Serratia marcescens and Micrococcus lutea as the inoculum. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

bc5 - A close-up view of a pour plate using Serratia marcescens as the inoculum. A variety of colonial shapes can be seen. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

The results of a pour plate using Serratia marcescens as the inoculum. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

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

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

The presence of a pellicle on the surface of a broth medium. 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

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

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

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

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

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

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

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