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Pseudomonas fluorescens showing flagella

Electron shadowed micrograph of Pseudomonas fluorescens showing flagella Read More

Examining Virus Bacterium Associations




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

Proteus mirabilis colonies

Proteus mirabilis colonies on depleted medium in false color by Sune Dano and Kasper Dyring-Anderson. From Dr. James Shapiro's lab where he studies bacterial genetics, and is interested in pattern formation during colony growth. Photo from microbialart.com

Dr. James Shapiro is a Professor in ... Read More

Yersinia pestis

As a closer view of PHIL 12265, this photograph depicts the colonial morphology displayed by Gram-negative Yersinia pestis bacteria, which was grown on a medium of sheep's blood agar (SBA), for a 72 hour time period, at room temperature. Y. pestis is the bacterium responsible for causing the inf... Read More

Using Wordcloud-Reponses to Discover How Students Perceive Concepts in the Classroom

In this blog, I share some "first word that comes to mind" responses of my freshman biology class to the words "germ," "bacteria," "cell," and "DNA." The way that we perceive an idea or concept definitely impacts our relationship with it. Thus, finding out what students think, coming into our ... Read More

Infectious bronchitis virus (IBV) virions

This 1975 transmission electron micrograph (TEM) revealed the presence of a number of infectious bronchitis virus (IBV) virions, which are Coronaviridae family members, and members of the genus Coronavirus. IBV is a highly contagious pathogen, which infects poultry of all ages, affecting a numbe... Read More

Phormidium with Sytox Green

Cyanobacteria (Phormidium) with the vital stain Sytox Green. These cells are dead (green). White arrow shows other bacteria living in association with the cyanobacteria. Read More

Yeast go viral #agarart2015

Unlike human viruses that cause disease, yeast viruses do not cause any obvious illness in yeast. On the contrary, some viruses of yeast are beneficial and produce toxins that kill off competing yeast, allowing their host to thrive. We often think of viruses as agents of death and disease, but... Read More

Yeast Cells - Electron Micrograph

Electron micrograph of a longitudinal section through budding yeast cells Read More

A spore from the bacterium Bacillus subtilis

A spore from the bacterium Bacillus subtilis shows four outer layers that protect the cell from harsh environmental conditions.

Bacillus subtilis is a ubiquitous bacterium commonly recovered from water, soil, air, and decomposing plant residue. The bacterium produces an endospore that allows... Read More

antibacterial producing actinomycetes from sediments of the Caspian Sea

the results of this investigation revealed that the marine actinomycetes collected from the sediments of Caspian Sea
might be a potent source of novel antibiotics. Read More

Why we should wash our hands regularly #3

When I first saw this photomicrograph of Haemophilus influenzae via immunofluorescence, I thought of the opening days of the first Gulf War, when CNN showed wall to wall images of the bombing of Baghdad. The crude nightvision technologies available at the time rendered everything in that green/... Read More

Pink-pigmented Pseudomonas Aeruginosa

A pink-pigmented strain of Pseudomonas aeruginosa is shown in the picture. This was photographed in University of Colorado Hospital's clinical lab by the microbiology department. The organism is shown on Mueller-Hinton agar for Kirby-Bauer sensitivity testing.

The pigment pyorubin is responsi... Read More

Anopheles sp. mosquito

This illustration depicts an Anopheles sp. mosquito transmitting sporozoites while obtaining a blood meal.

During a blood meal, a malaria-infected female Anopheles sp. mosquito inoculates its human host with sporozoites, which then infect human liver cells, where they mature into schizonts, w... Read More

Paramecium caudatum

Nikon Small World Honorable Mention 2010 photomicrography competition, Gerd A. Guenther, Düsseldorf, NRW, Germany

Subject Matter: Paramecium caudatum fed with Congo red-stained yeast, living specimen (600x)
Technique: Differential interference contrast Read More

HIV particles infecting a human T cell

Scanning electron micrograph of HIV particles infecting a human T cell. Credit: NIAID, NIH Read More

Microbiology Wreath

Dr. Donna Stolz of the University of Pittsburgh assembled a wreath collage of mammalian cells stained for various proteins and organelles magnified from 220x to 2000x.

Nikon’s Small World Photomicrography Competition Read More

Baby Seal near McMurdo Station in Antarctica

This baby seal was found on the sea ice near McMurdo Station during one of many excursions to collect soil samples for microbiological analysis. During November and December, there are many baby seals in the area. Photo taken by Hubert Staudigel from the Scripps Institution of Oceanography and... Read More

Bacteriophage P22

Cross-section through the center of a three-dimensional (3D) reconstruction of P22 phage, which is a virus that infects Salmonella bacteria. P22 contains many copies each of nine different viral proteins and a single copy of a double-stranded DNA genome (shown in green). The centrally located po... Read More

Paecilomyces sp.

Paecilomyces sp. Tapered conidiophores (430X) Read More

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