Colorized scanning electron micrograph of malaria (Plasmodium yoelii nigeriensis) oocysts ( thick-walled structure in which sporozoan zygotes develop) developing on the midgut wall of the mosquito Anopheles.
Credit: Hilary Hurd, Wellcome Images Read More
Mannitol Salt Agar (MSA)
•Important Ingredients: Phenol red, mannitol (sugar), 7.5% NaCl
•Differential: between pathogenic S. aureus and S. epidermidis
•Selective: NaCl inhibits non-halophilic organisms. Organism that can grow are halophilic.
•Mannitol Fermentors: fermentation of acid cau... Read More
Scanning Electron Micrograph of Burkholderia cepacia.
Burkholderia cepacia is the name for a group or “complex” of bacteria that can be found in soil and water. B. cepacia bacteria are often resistant to common antibiotics.
B. cepacia poses little medical risk to healthy people. However,... Read More
This 1975 transmission electron micrograph (TEM) revealed the presence of a number of infectious bronchitis virus (IBV) virions, which are Coronaviridae family members, and members of the genus Coronavirus. IBV is a highly contagious pathogen, which infects poultry of all ages, affecting a numbe... Read More
Echinococcus granulosus is a tapeworm parasite that in its larval form can cause hydatid disease, which is characterized by cysts forming within the victim's body. In order to complete its lifecycle, the tapeworm must infect two hosts, a carnivore and a herbivore.
The adult form of Echinococc... Read More
H1N1 Mass Vaccination Clinic poster from a high school located in NorthWest, DC, November 6, 2009. Read More
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
tissue section h & e strain diptheritic tonsillitis Read More
Clostridium botulinum on egg yolk agar. Note a absence of precipitate around colonies. 5X - LeBeau Read More
Under the microscope, an E. coli cell lights up like a fireball. Each bright dot marks a surface protein that tells the bacteria to move toward or away from nearby food and toxins. Using a new imaging technique, researchers can map the proteins one at a time and combine them into a single image.... Read More
Exophiala jeanselmei hyphae in walls of 'cyst'. Phaeohyphomycosis Read More
Tangential sections of hyphae of Mortierella sp. in a skin ulcer Read More
b323-4 clostridium perfringens biochemical reactions 15x Read More
The bacterium, Enterococcus faecalis, which lives in the human gut, is just one type of microbe that will be studied as part of NIH's Human Microbiome Project. Read More
Cyanobacteria (Phormidium) with the vital stain Sytox Green. Yellow/green cells are dead. Red is chlorophyll a fluorescence in live cells.
Photo Credit: Barry H. Rosen, USGS
Scanning electron micrograph of HIV particles infecting a human T cell. Credit: NIAID, NIH Read More
Unlike human viruses that cause disease, yeast viruses do not cause any obvious illness in yeast. On the contrary, some viruses of yeast are beneficial and produce toxins that kill off competing yeast, allowing their host to thrive. We often think of viruses as agents of death and disease, but... Read More
Magnified 1125X, this photomicrograph revealed some of the ultrastructural morphology displayed by the dematiaceous (pigmented) filamentous fungus, Phialophora richardsiae.
Note the septate hyphae from which sprout the short conidiophores, and still further distally one can see the flask-shap... Read More