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Tissue tropism is the range of cells and tissues of a host that support growth of a particular pathogen, such as a virus, bacterium or parasite. [1] [2] Some bacteria and viruses have a broad tissue tropism and can infect many types of cells and tissues. [1] Other viruses may infect primarily a single tissue. [1]
Bone canaliculi are microscopic canals between the lacunae of ossified bone.The radiating processes of the osteocytes (called filopodia) project into these canals. These cytoplasmic processes are joined together by gap junctions.
Influenza B virus is almost exclusively a human pathogen, and is less common than influenza A. The only other animal known to be susceptible to influenza B infection is the seal . [ 47 ] This type of influenza mutates at a rate 2–3 times lower than type A [ 48 ] and consequently is less genetically diverse, with only one influenza B serotype ...
Like other members of the Paramyxoviridae family, it produces enveloped virions, and is a negative-sense single-stranded RNA virus. The virus is particularly fragile and is quickly inactivated by heat, desiccation, and sunlight. [14] Measles virus evolved from the then-widespread rinderpest virus most probably between the 11th and 12th ...
Paramyxoviridae (from Greek para-“by the side of” and myxa “mucus”) is a family of negative-strand RNA viruses in the order Mononegavirales. [1] [2] Vertebrates serve as natural hosts. [3]
Confirmation is by laboratory testing to detect the virus's RNA, antibodies for the virus, or the virus itself in cell culture. [1] Other conditions that may present similarly include Ebola, malaria, typhoid fever, and yellow fever. [1] The Lassa virus is a member of the Arenaviridae family of viruses. [1] There is no vaccine. [6]
Sindbis virus may have originated in South America. [13] The equine encephalitis viruses and the Sindbis virus are related. The Old World and New World viruses appears to have diverged between 2000 and 3000 years ago. [14] Divergence between the Venezuelan equine encephalitis virus and the eastern equine virus appears to have been ~1400 years ...
Coronaviridae is a family of enveloped, positive-strand RNA viruses which infect amphibians, birds, and mammals.Commonly referred to as coronaviruses in the English language, the family coronaviridae includes the subfamilies Letovirinae and Orthocoronavirinae; the latter also known as coronavirinae.