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Cryptococcus neoformans

Cryptococcus neoformans in solitary nodule (400X) 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

Histoplasma capsulatum fungal macroconidium

At a magnification of 1125X, this photomicrograph revealed some of the ultrastructural morphology exhibited by a Histoplasma capsulatum fungal macroconidium. The reproductive spores produced by H. capsulatum can be either macroconidia or microconidia. It is the macroconidia that exhibits finger-... 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

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

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

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

Paecilomyces sp.

Paecilomyces sp. Tapered conidiophores (430X) Read More

Yeast Cells - Electron Micrograph

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

Fluid Thioglycollate Media

Organisms grown in Fluid Thioglycollate Media w/out resazurin dye is a reducing media that uses sodium thioglycollate to chemically combine with dissolved oxygen to deplete the oxygen in the media. All organism except for Neisseria sicca were grown for 48 hours at 37 degrees C. Neisseria sicca i... Read More

Legionella pneumophila colonies

Under a low magnification of 5X, this photograph depicted a number of Legionella pneumophila colonies that had been cultivated on Feeley-Gorman (FG) agar. Note the “cut-glass” appearance displayed by the round, off-white colored colonies. FG agar is used particularly in the cultivation of Legion... Read More

Introducing the Thanatomicrobiome

In a healthy adult human body, most internal organs such as the brain, spleen, liver, and heart are devoid of microorganisms because the immune system keeps them in check. After human host death, however, the immune system falters and microorganisms proliferate throughout the body beginning in ... Read More

Sarcocystis spp. zoites

Sarcocystis spp. zoites Read More

Bio-luminescent microbes " Phytoplankton"

One of the most famous pictures of the Vaadhoo Island comes from a night where dots of light seemed to float to the shore. They made the cost look like it was covered in stars.
At night, it is not uncommon for Bio-luminescent microbes called Phytoplankton to be seen along the coast, though even... Read More

BacterioFiles 196 - Flagellin Facilitates Flu-shot Function

This episode: Bacteria are important for a good immune response to unadjuvanted influenza vaccines!

(14.6 MB, 16 minutes)

Show notes: 
News... Read More

Gram-negative rods

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

Cryptococcus neoformans

Cryptococcus neoformans abscess. H & E stain (1000X) 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

Bacillus anthracis tenacity positive on sheep blood agar

B. anthracis Colony Characteristics: A. Consistency sticky (tenacious). When teased with loop, colony will stand up like beaten egg white.

Read More

Methyl Red/Vogoes-Proskauer (MR-VP)

Methyl Red/Vogoes-Proskauer (MR-VP)
One medium used for two separate but related tests, identifying butanediol (VP) or acidic fermentation products (MR) as part of the IMViC test used in the identification of Enterobacteriaceae.

•Methyl Red (MR): detects the ability of an organism to produc... Read More
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