Ultrastructural appearance of a single virion of the measles virus, transmission electron microscopy (TEM). The virus is 100-200 nm in diameter, with a core of single-stranded RNA. It causes measles, an infection of the respiratory system. It is very contagious and is spread by coughing, sneezing and close personal contact or contact with infected fluids. Symptoms may include fever, runny nose, cough, red eyes and a generalized rash. Prior to 1963, almost everyone got measles. However, after vaccination became available for the disease, the number of cases dropped by 98 %. Image courtesy of the Centers for Disease Control and Prevention (CDC / Cynthia S. Goldsmith; William Bellini, Ph.D.).
Common environmental / allergenic mold (Cladosporium spp.); fungal hyphae producing spores. Synonym - Hormodendrum. Magnification 340, scanning electron microscopy. This specimen was found on the inner surface of a buildings air supply duct. This genus is the most common outdoor airborne mold but may occur in homes. It is an allergenic mold producing over 10 different types of antigens. The spores are easily made airborne and are a common cause of respiratory problems. It is frequently found at elevated levels in water-damaged environments. The genus Cladosporium includes over 30 species. The most common ones include Cladosporium elatum, Cladosporium herbarum, Cladosporium sphaerospermum (common indoors), and Cladosporium cladosporioides. Cladosporium can cause mycosis and extrinsic asthma (immediate-typehypersensitivity: type I). Acute symptoms include edema and bronchiospasms, chronic cases may develop pulmonary emphysema. Certain species cause systemic fungal infections and has been documented in cases of blastomycosis, candidiasis, chromoblastomycosis, histoplasmosis, entomophthoromycosis, onychomycosis, sinusitis, pulmonary infections, phaeohyphomycosis and keratomycosis. Cladosporium spp. can also be associated with the spoilage of refrigerated meats. Courtesy of Dennis Kunkel.
By The Encyclopedia of Earth.
Composting is the controlled biological decomposition and pasteurization of organic materials under aerobic conditions - it involves the action of mesophilic microorganisms followed by thermophilic microorganisms that thrive under increased (more than 50 °C) temperature conditions and if correctly managed, can destroy disease-causing organisms, even weed seeds.
By Microbe Magazine.
Pathogenic microbes can be put into two general categories: those acquired from the environment and those acquired from other humans and animals. Microbes that are acquired from the environment typically can survive in environmental niches and also in their hosts.
By The Encyclopedia of Earth.
Over the past decade, the complexity of climate change has been the subject of extensive discussion. However, microbial factors associated with climate change, notably infectious diseases, are rarely, if ever, included in climate models.
Furthering progress in veterinary virology, as well as education, free exchange of information and to provide an organization for individuals who devote a significant portion of their professional activities to research, teaching or the practical application of veterinary virology.
An association of scientists devoted to research on single-celled eukaryotes, or protists. The ISOP promotes the presentation and discussion of new or important facts and problems in protistology, and works to provide resources for the promotion and advancement of this science.
This virus also know as the Seoul virus is a species of hantavirus that belongs to the Bunyaviridae family. It causes mild to moderate illness that is normally rarely fatal. People can become infected with this virus after coming in contact with urine, droppings, or saliva of infected rodents. The virus is not known to be spread from person to person.