Gram-negative rods –Alcaligenes faecalis species (approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Histoplasma duboisii. The single nucleus, characteristic of Histoplasma duboisii (and of Histoplasma capsulatum) can be seen in many of the fungal cells. Note large cell size Read More
An isolated Klebsiella oxytoca on MacConkey Agar from a patient with diarrhea. Look at its mucous appearance a characteristic of most Klebsiella. Read More
Normal guinea pig eye (see http://www.microbeworld.org/index.php?option=com_jlibrary&view=article&id=2524 for other, infected eye via Sereny test). Read More
Bright red-orange photoluminescence observed from porous silicon nanoparticles with human HeLa cells, magnified 1000 times and viewed in the reflection from a silicon wafer. Prepared from high-purity silicon wafers, these nanoparticles provide a nontoxic and biodegradable alternative to conventi... Read More
Aspergillus fumigatus. Typical dichotomous branching of hyphae in pulmonary lesion of a horse. PAS stain Read More
Poisons are unleashed when colonies of bacteria get too close, creating a toxic no-man's land in between.
Research by Eshel Ben-Jacob of the University of California, San Diego's, Center for Theoretical Biological Physics, Ben-Jacob of Tel Aviv University, Avraham Be'er of the University of T... Read More
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
Neisseria meningitidis colonies on chocolate agar with positive oxidase test as indicated by black colonies (1:2) Read More
When I worked at a vet hospital people asked me all the time whether dog's mouths were cleaner than humans. I always told them it was an old wive's tale & wondered about their personal hygiene. Turns out I was wrong! Read More
A close-up of the surface of a streak plate using a mixed culture of Serratia marcescens and Micrococcus lutea as the inoculum. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. 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
A clear view of a Spirogyra filament showing the spiral chloroplast. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
As referenced in the most recent episode of This Week in Parasitism, Dickson Despommier, Mailman School of Public Health, Columbia University, and Yuzo Takahashi, Department of Parasitology, Gifu University School of Medicine, have posted hundreds of scanning electron microgra... Read More
Science blogger Cesar Sanchez of the site Twisted Bacteria (twistedbacteria.blogspot.com) created the above word cloud that was generated from approximately 1200 tweets that appeared on Twitter during the American Societ... Read More
Magnified 1125X, this Gomori-stained photomicrograph revealed the presence of a Penicillium marneffei yeast cell, which was found in a specimen of human spleen.
P. marneffei is endemic to Southeast Asia, where it is one of the more common HIV-related opportunistic infections. Penicillium spp.... Read More
Magnified 1000X, this Liefson’s flagella stained photomicrograph revealed the presence of a number of flagellated Brevundimonas diminuta, formerly known as Pseudomonas diminuta.
After having run DNA-rRNA hybridization studies, the genus Brevundimonas has been reclassified as a member of the p... Read More