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Blastomyces dermatitidis

Blastomyces dermatitidis in giant cells. Fungi are usually numerous and below average size in these giant cells Read More

Toxoplasma parasite's greedy appetite may be its downfall

Toxoplasma gondii is estimated to chronically infect nearly one-third of the world's population, causing the condition Toxoplasmosis. It is most commonly associated with handling cat feaces and is a particular threat to pregnant women and immune-compromised individuals, such as HIV/AIDS patients... Read More

Corynebacterium - Tissue section

Corynebacterium - Tissue section. H & E stain. Diphtheritic tonsillitis Read More

Plasmodium vivax

Plasmodium vivax mature schizont (1000X) Read More

Streptococcus mitis on blood agar

Growth of Streptococcus mitis on blood agar demonstrating alpha hemolysis seen as a greenish color around the growing colonies due to a reduction of the hemoglobin to methemoglobin in the surrounding agar. Image taken using transmitted light. Read More

Lung tissue from case of Aspergillosis

Lung tissue from case of Aspergillosis. PAS stain (900X) Read More

Illustration of sites of embryonated egg inoculation

Illustration of sites of embryonated egg inoculation Read More

Malabaricus Grouper Nervous Necrosis Virus

The foreground shows the density map (gold) from a cryoelectron micrographic reconstruction of malabaricus grouper nervous necrosis virus, a fish nodavirus. The background shows the fitting of a two-domain model consisting of a protruding domain and a β-sandwich domain into the reconstruction de... Read More

Bacillus subtilis

Streak plate isolation showing colonial morphology of Bacillus subtilis on trypticase soy agar (TSA) incubated for 24 hours at 37oC. Note the rough and dry/matte texture characteristic of this organism’s growth. Read More

Negative stain smallpox virus

Magnification 65,000X.

Smallpox is a serious, highly contagious, and sometimes fatal infectious viral disease. There is no specific treatment for smallpox disease, and the only prevention is a smallpox vaccination. Read More

Swarm of paramecia surrounding an unidentified protozoan

Swarm of paramecia surrounding an unidentified protozoan. From the Wistreich Collection. Read More

Quantitative precipitin test

Quantitative precipitin test. Constant antibody with 2-fold increase in antigen concentration. Note inhibition in antigen excess and precipitation in equivalence zone. Read More

Two different proteins produced by anthrax bacteria, Protective Antigen, Lethal Factor

A computer model shows side and top views of two different proteins produced by anthrax bacteria. The green molecule is "protective antigen" (PA), which spontaneously forms pores that penetrate organic membranes such as cell walls. The yellow molecule is "lethal factor (LF)." When a voltage is a... Read More

The #LuxArt2015 Art Competition By My Students!

Because of all the recent interest in "microbiological art," I decided to challenge my Biology 350 students to "paint" using luminous bacteria. We have a balloting process, tallied the results, and made some appropriate awards! I think the world of my students, and I hope you enjoy this view i... Read More

6.5% NaCl Media

Important ingredients: 6.5% salt, dextrose, bromcresol purple
Differential/Selective: used to test for salt tolerance and can be used to identify enterococcal group D streptococci. NaCl is a selective agent and those organisms that can grow in higher salt concentrations also ferment the dextro... Read More

Halloween microbes

Strep agalactiae (Group B Strep) streaked out on Granada plates. Usually this media is used to screen for Group B in pregnant patients, the strep will grow as bright orange colonies while any other growth will be colorless. Perfect for a little Halloween fun...follow me on instagram @stylish_str... Read More

"The Unseen World"

Philadelphia artist Kate Kaman (www.katekaman.com) has designed a dynamic larger-than-life sculptural depiction of the most plentiful and ancient microscopic life forms -- bacteria. Suspended throughout an area measuring approximately 130 feet long, 27 feet wide and 41 feet tall, “The Unseen Wor... Read More

Orange pigmented crustose lichens

Orange pigmented crustose lichens. From the Wistreich Collection. Read More

photograph of the skin lesions in man with the septicemic type of infection with erysipelothrix rhusiopathiae

photograph of the skin lesions in man with the septicemic type of infection with erysipelothrix rhusiopathiae Read More

Neisseria meningitidis in sputum. Gram stain (1000X)

Neisseria meningitidis in sputum. Gram stain (1000X) Read More
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