Mostly those that are caused by Simian Virus 40 (SV40)
The polyomavirus simian virus 40 (SV40) is a known oncogenic DNA virus which induces primary brain and bone cancers, malignant mesothelioma, and lymphomas in laboratory animals.
[SIZE=5]What does SV40 do to humans?[/SIZE]
The polyomavirus simian virus 40 (SV40) is a known oncogenic DNA virus which induces primary brain and bone cancers, malignant mesothelioma, and lymphomas in laboratory animals. Persuasive evidence now indicates that SV40 is causing infections in humans today and represents an emerging pathogen.
[SIZE=5]How is SV40 transmitted?[/SIZE]
Simian virus 40 (SV40) is a small DNA tumor virus of monkey origin. This polyomavirus was administered to human populations mainly through contaminated polio vaccines, which were produced in naturally infected SV40 monkey cells.
[SIZE=5]Where did SV40 come from?[/SIZE]
Polio vaccines used in the late 1950s and early 1960s were contaminated with a virus called simian virus 40 (SV40) present in monkey kidney cells used to grow the vaccine.
[SIZE=5]Is SV40 contagious?[/SIZE]
Recent molecular biology and epidemiological studies suggest that SV40 may be contagiously transmitted in humans by horizontal infection, independently from the earlier administration of SV40-contaminated vaccines.
What’s Horizontal Transmission
In general, transmission of viruses can occur through two pathways: horizontal and vertical transmission. In horizontal transmission, viruses are transmitted among individuals of the same generation, while vertical transmission occurs from mothers to their offspring.
What are examples of horizontal infections?
Examples include acute bacterial infection; viruses such as HIV, hepatitis B virus (HBV), hepatitis C virus (HCV), West Nile virus, and rabies; chronic fungi (e.g., coccidiomycosis, histoplasmosis); and parasites (e.g., Toxoplasma gondii, Strongyloides).