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This negatively-stained transmission electron micrograph (TEM) revealed the presence of numerous hepatitis B virus (HBV) virions, also know as Dane particles. HBV contains a genome of DNA, and is a member of the family of viruses known as Hepadnaviridae. It is the cause of a serious disease that attacks the liver, and an infection that can be lifelong, known as cirrhosis (scarring) of the liver, liver cancer, liver failure, and death. Hepatitis B vaccine is available for all age groups to prevent hepatitis B virus infection.Created: 1976
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This negatively-stained 1975 transmission electron micrograph (TEM) revealed the presence of a number of Venezuelan equine encephalitis (VEE) virus virions in this tissue specimen, which had additionaly been fixed using phosphotungstic acid (PTA). This chemical is very electron-dense, and due to proposed electrostatic forces of attraction, clings to the capsid surface of each viral particle or virion, thereby, highlighting the presence of such pathogens. VEE is a Togaviridae family member, and a member of the genus Alphavirus.Created: 1975
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This transmission electron micrograph (TEM) revealed some of the morphologic details displayed by the Colorado tick fever virus (CTFV), a member of the genus Coltivirus, one of nine genera of the virus family known as the Reoviridae. Coltivirus particles are 80 nm in diameter and have a core 50 nm in diameter. Electron microscopic studies have shown particles with a relatively smooth capsomeric surface structure, and icosahedral symmetry.Created: 1975
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This 1975 transmission electron micrograph (TEM) revealed the presence of a number of Eastern Equine Encephalitis (EEE) virus virions that happened to be in a specimen of central nervous system tissue. EEE is a zoonotic arbovirus, which means that its spead to human beings through the bite of an infected mosquito. EEE virus (EEEV) occurs in the eastern half of the United States where it causes disease in humans, horses, and some bird species. Because of the high mortality rate, EEE is regarded as one of the most serious mosquito-borne diseases in the United States. EEE is a Togaviridae virus family member, and the genus Alphavirus.Created: 1975
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This transmission electron micrograph (TEM) revealed some of the morphologic details displayed by the Colorado tick fever virus (CTFV), a member of the genus Coltivirus, one of nine genera of the virus family known as the Reoviridae. Coltivirus particles are 80 nm in diameter and have a core 50 nm in diameter. Electron microscopic studies have shown particles with a relatively smooth capsomeric surface structure, and icosahedral symmetry.Created: 1975
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This negatively-stained transmission electron micrograph (TEM) revealed the presence of numerous Semliki Forest virus virions, which were present in a muscle tissue specimen. Named for the region in which they were isolate from mosquitoes, the Semliki Forest, Uganda, this virus is a Togaviridae family member, and the genus, Alphavirus.Created: 1975
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This 1975 transmission electron micrograph (TEM) revealed the presence of a number of Eastern Equine Encephalitis (EEE) virus virions in this specimen of central nervous system tissue. EEE is an zoonotic arbovirus, which means that its spead to human beings through the bite of an infected arthropod, which in this case, is a mosquito. EEE virus (EEEV) occurs in the eastern half of the United States where it causes disease in humans, horses, and some bird species. Because of the high mortality rate, EEE is regarded as one of the most serious mosquito-borne diseases in the United States. EEE is a Togaviridae virus family member, and the genus Alphavirus.Created: 1975
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This 1975 transmission electron micrograph (TEM) revealed the presence of a number of Eastern Equine Encephalitis (EEE) virus virions in this tissue specimen. EEE is an zoonotic arbovirus, which means that its spead to human beings through the bite of an infected arthropod, which in this case, is a mosquito. EEE virus (EEEV) occurs in the eastern half of the United States where it causes disease in humans, horses, and some bird species. Because of the high mortality rate, EEE is regarded as one of the most serious mosquito-borne diseases in the United States. EEE is a Togaviridae virus family member, and the genus Alphavirus.Created: 1975
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This transmission electron micrograph (TEM) depicted numbers of Lassa virus virions adjacent to some cell debris. The virus, a member of the virus family Arenaviridae, is a single-stranded RNA virus, and is zoonotic, or animal-borne that can be transmitted to humans. The illness, which occurs in West Africa, was discovered in 1969 when two missionary nurses died in Nigeria, West Africa.In areas of Africa where the disease is endemic (that is, constantly present), Lassa fever is a significant cause of morbidity and mortality. While Lassa fever is mild or has no observable symptoms in about 80% of people infected with the virus, the remaining 20% have a severe multisystem disease. Lassa fever is also associated with occasional epidemics, during which the case-fatality rate can reach 50%.Created:
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This highly magnified transmission electron micrograph (TEM) depicted some of the ultrastructural details of a number of Lassa virus virions adjacent to some cell debris. The virus, a member of the virus family Arenaviridae, is a single-stranded RNA virus, and is zoonotic, or animal-borne that can be transmitted to humans. The illness, which occurs in West Africa, was discovered in 1969 when two missionary nurses died in Nigeria, West Africa.In areas of Africa where the disease is endemic (that is, constantly present), Lassa fever is a significant cause of morbidity and mortality. While Lassa fever is mild or has no observable symptoms in about 80% of people infected with the virus, the remaining 20% have a severe multisystem disease. Lassa fever is also associated with occasional epidemics, during which the case-fatality rate can reach 50%.Created:
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This negatively-stained transmission electron micrograph (TEM) revealed the presence of numerous Russian spring-summer encephalitis (RSSE) virions, which are members of the virus family, Flaviviridae. RSSE is transmitted when one is bitten by a Ixodes persulcatus hard tick, and is therefore, referred to as a tick-borne encephalitis (TBE).Created: 1975
