Review of poxvirus: emergence of monkeypox

A Morand1, S Delaigue2, J J Morand3

  • 1Service de pédiatrie, CHU Timone, Marseille, France.

Insights

This review covers poxvirus infections, including eradicated smallpox, emergent monkeypox and cowpox, and molluscum contagiosum. Monitoring is crucial due to bioterrorism risks and increased global travel.

Area of Science:

  • Virology
  • Infectious Diseases
  • Public Health

Background:

  • Poxvirus infections encompass a range of viral diseases with varying public health significance.
  • Smallpox, though eradicated, poses a persistent threat due to potential reintroduction.
  • Emerging poxviruses like monkeypox and cowpox are of increasing concern.

Purpose of the Study:

  • To review the diverse spectrum of poxvirus infections.
  • To highlight the ongoing risks associated with smallpox and the emergence of other poxviruses.
  • To discuss the clinical significance and public health implications of molluscum contagiosum.

Main Methods:

  • Literature review of poxvirus infections.
  • Analysis of epidemiological trends and risk factors for poxvirus dissemination.
  • Clinical case discussions for molluscum contagiosum.

Main Results:

  • Smallpox eradication requires continued vigilance against reintroduction.
  • Monkeypox and cowpox are emergent threats amplified by global transport and waning immunity.
  • Molluscum contagiosum presents mild infections in children and serves as an indicator for STIs and AIDS in adults.

Conclusions:

  • Poxvirus infections remain a significant public health concern requiring ongoing surveillance.
  • Factors such as international travel and loss of vaccination increase the risk of poxvirus outbreaks.
  • Understanding the varied clinical presentations of poxviruses is essential for diagnosis and management.

Related Concept Videos

Viral Recombination00:57

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Smallpox01:24

Smallpox

Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
Chickenpox01:20

Chickenpox

Chickenpox is an acute, highly contagious disease caused by the varicella-zoster virus (VZV), a double-stranded DNA virus belonging to the Herpesviridae family. Its transmission occurs primarily through the inhalation of respiratory droplets or direct contact with vesicular fluid from skin lesions. The incubation period typically ranges from 10 to 21 days, during which the virus replicates and disseminates through sequential phases within the host. Although generally self-limiting in children,...
Poliomyelitis01:17

Poliomyelitis

Poliomyelitis is caused by poliovirus, a small, non-enveloped, positive-sense RNA virus of the Picornaviridae family and Enterovirus genus. Transmission occurs primarily via the fecal-oral route, often through ingestion of contaminated water or food. The virus initially replicates in the oropharynx and intestinal mucosa, particularly in lymphoid tissues such as the tonsils, Peyer’s patches, and regional lymph nodes. Primary viremia follows, allowing dissemination throughout the body.In most...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...