These bacteria induce the assembly of actin-rich tails in the host cell cytoplasm, which enable them to move rapidly. Motile bacteria spread from cell to cell by forming membrane-enclosed protrusions that are engulfed by neighboring cells. (B) Fluorescence micrograph of the bacteria moving in a ... Read More
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
This scanning electron micrograph shows mycoplasma (colorized pink), a genus of bacteria that lack a cell wall. Without a cell wall they are unaffected by many common antibiotics, such as penicillin, or other beta-lactam antibiotics that work by targeting cell wall synthesis. These mycoplasma ar... Read More
This digitally-colorized scanning electron micrograph (SEM) depicted large numbers of Gram-positive Enterococcus faecalis sp. bacteria.
“Enterococci, leading causes of nosocomial bacteremia, surgical wound infection, and urinary tract infection, are becoming resistant to many and sometimes al... Read More
This scanning electron micrograph (SEM) depicts a number of Leptospira sp. bacteria atop a 0.1. µm polycarbonate filter.
Leptospira interrogans causes leptospirosis, a usually mild febrile illness that may result in liver or kidney failure. Leptospira is a flexible, spiral-shaped, Gram-negati... Read More
Corynebacterium diphtheriae. Elek plates showing lines of identity. Paper strip is saturated with antitoxin organisms (black growth) producing toxin Read More
Exophiala jeanselmei. 37 Days at 30C on cornmeal agar. Dark brown slow-growing colony Read More
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
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
Gram-negative rods –Alcaligenes faecalis species (approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
. . . 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
Photomicrographs of smears of fowl blood showing Borrelia anserina Read More
Streptomyces spp. on various cultivation media. Production of different pigments and formation of aerial mycelia. Colonies after approximately 15 days of cultivation in aerobic atmosphere, 28°C. Environmental isolates.
Streptomyces is the largest genus of Actinobacteria and the type genus of ... Read More
Under a low magnification of 23X, this scanning electron micrograph (SEM) depicted a dorsal view of an unidentified male Dermacentor sp. tick found upon a cat in the suburbs of Decatur, Georgia, which measured approximately 3.5mm from its gnathosoma (i.e., capitulum), which is where its mouthpa... Read More
Entomophthora coronata in tissue. Splendore-Hoeppli effect. H & E stain (450X) Read More
This image of the common Eschericia coli--or E. coli--was taken using a special microscope called an Atomic Force Microscope (AFM). The AFM image was produced by tracking across the top of the bacteria with a very sharp tip. The tip is as sharp as a few atoms. The very small change in height (am... Read More