Blastomyces dermatitidis. Yeast stage from 2-day culture on blood agar at 37 . Note double refractile cell wall Read More
Simple crystal violet stained preparation mainly consisting of B. subtilis spores with a few scattered rods. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
Exophiala jeanselmei. Note long slender conidiophores with terminal sporulation. Secondary budding of conidia is rare. LCB mount. Read More
This negatively-stained transmission electron micrograph (TEM) revealed the presence of Rubella virus virions, as they were in the process of budding from the host cell surface to be freed into the host’s system, thereby, producing an enveloped virus particle, which means that after budding, the... Read More
Colony of Streptomyces (sp.) on Sabouraud's dextrose agar, incubated at 30C Read More
Mycobacterium smegmatis colonies on lowenstein-jensen media (2x) Read More
Mycoplasma pneumoniae. Macrophotograph of 16mm petri dish containing microcolonies characteristics of broth-grown Mycoplasma pneumoniae Read More
Legionella pneumophilia in yolk sac of embryonated egg as stained by the Gimenez method Read More
This pair of confocal micrographs demonstrates how a disease-causing strain of E. coli bacteria brings about diarrhoea by breaking down the waterproof barriers between the cells. The bacteria are seen as small red dots attached to the surface of intestinal cells making tiny pedestals out of one ... Read More
Gram-stained preparation of Bacillus subtilis showing rods, and spores (empty areas). (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
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
This is an image of Clostridium difficile colonies grown on cycloserine mannitol agar after 48 hours.
C. difficile, an anaerobic gram-positive rod, is the most frequently identified cause of Antibiotic-Associated Diarrhea (AAC). It accounts for approximately 15-25% of all episodes of AAC.
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I comment a bit, as an educator, about the loss of Carl Woese. Not only the importance of his discoveries, but how he went about his work, remains of great value. Read More