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Caulobacter crescentus

The tiny water bacterium Caulobacter crescentus secretes a sugary substance so sticky that just a tiny bit could hold several cars together. First, it attaches to a surface at the end of its cell body, which has a propeller-like flagellum. On contact, the flagellum stops moving with help from ne... Read More

Schistosomiasis poster

Photograph of a poster issued by the Chinese government in the late 1970s depicting the spread of schistosomes to humans from snails as a consequence of agricultural practices. These posters have been in the office of Dickson Despommier since the 1970s. 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

Photomicrographs of smears of fowl blood showing Borrelia anserina

Photomicrographs of smears of fowl blood showing Borrelia anserina Read More

Salmonella enteritidis

Salmonella is a gram-negative, rod-shaped bacilli that can cause diarrheal illness in humans. They are microscopic living creatures that pass from the feces of people or animals to other people or other animals.

The Salmonella family includes over 2,300 serotypes of bacteria which are one-cel... Read More

RSV - we meet again!

Ahh the Human Respiratory Syncytial Virus - more commonly known as RSV. The last 2 times we' ve met it's been sick infants, ambulance calls, & in 1 case a hospital admit. In the United States, 60% of infants are infected during their first RSV season, and nearly all children will have been ... Read More

Anaerobic jar

Anaerobic jar Read More

Illustration of Toxoplasma gondii

Illustration of Toxoplasma gondii-extraintestinal cycle in cells of mammals Read More

Aspergillus sp. organisms

Magnified 562X this photomicrograph, stained using an “Aspergillus” conjugate fluorescent antibody (FA) staining technique, revealed the presence of Aspergillus sp. organisms, in a case of aspergillosis.
What is Aspergillus?

Aspergillus is a fungus (or mold) that is very common in the enviro... Read More

Pseudomonas fluorescens showing flagella

Electron shadowed micrograph of Pseudomonas fluorescens showing flagella Read More

Exophiala jeanselmei

Exophiala jeanselmei. 37 Days at 30C on cornmeal agar. Dark brown slow-growing colony Read More

Klebsiella oxytoca on MacConkey Agar

An isolated Klebsiella oxytoca on MacConkey Agar from a patient with diarrhea. Look at its mucous appearance a characteristic of most Klebsiella. Read More

Predictably beautiful

As the bacteria grow within a biofilm, they organize themselves into reproducible patterns and shapes that can be predicted with mathematical models.
Image: Confocal microscopy of a bacterial biofilm composed of Escherichia coli expressing the fluorescent proteins mCherry and sfGFP. The image w... Read More

Yeast Cells - Electron Micrograph

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

Nonseptate hyphae of Mucor pusillus

Nonseptate hyphae of Mucor pusillus which have occluded a vessel. H & E stain 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

Dr. Robot (he kind of looks like one) is telling you . . .

. . . to do YOUR part to help stamp out what are now called STI's. Funny how as our knowledge of STI's and our ability to treat them has bloomed, our societal level of comfort with such PSAs seems to have withered. I used to see cleverly designed (and carefully/antiseptically couched) PSAs ab... Read More

Mucor sp. fungal organism

Under a magnification of 200x, and using a lactophenol cotton blue mount fixation technique, this photomicrograph reveals some of the ultrastructural morphology exhibited by a Mucor sp. fungal organism. This image depicts two sporangia, a mature structure, which had ruptured, releasing its conte... Read More

Bacillus species

Simple stained preparation of Bacillus species showing rods and spores. (approx. X 970). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. 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

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