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presence of a number of novel h1n1 virus virions in this tissue culture sample

presence of numerous herpes simplex virions members of the herpesviridae virus family

negatively stained transmission electron micrograph revealed presence of numerous herpes simplex virions

electron micrograph reveals the presence of hepatitis b virus hbv dane particles or virions

digitally colorized transmission electron micrograph revealed the presence of hepatitis b virions

presence of russian spring summer encephalitis rsse virus virions in this tissue sample

presence of numerous st louis encephalitis virions that were contained within a central nervous system tissue sample

presence of a number of eastern equine encephalitis eee virus virions

photomicrograph of serohemorrhagic meningitis in a case of fatal human anthrax with the presence of bacillus anthracis

presence of two mycobacterium tuberculosis rod shaped bacteria otherwise known as bacilli
