Preventing and treating secondary bacterial infections with antiviral agents

Jonathan A McCullers1

  • 1Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, USA. jon.mccullers@stjude.org

Antiviral Therapy
|March 31, 2011
PubMed

Insights

Bacterial super-infections worsen influenza outcomes. New antiviral strategies targeting viral-bacterial interactions, not just the virus itself, could improve patient survival.

Area of Science:

  • Microbiology
  • Virology
  • Infectious Diseases

Background:

  • Bacterial super-infections significantly increase morbidity and mortality in influenza and other respiratory viral infections.
  • Limited clinical data exist on the efficacy of current antiviral drugs against secondary bacterial complications of influenza.
  • The H1N1 influenza pandemic underscored the critical need for better treatments for these bacterial coinfections.

Purpose of the Study:

  • To review current understanding of viral-bacterial interactions in respiratory infections.
  • To explore the potential of novel antiviral drug development strategies targeting these interactions.
  • To improve patient outcomes beyond direct viral inhibition.

Main Methods:

  • Review of basic and clinical research on viral-bacterial synergism.
  • Analysis of mechanisms underlying secondary bacterial infections during viral respiratory illnesses.
  • Evaluation of potential therapeutic targets in viral-bacterial interactions.

Main Results:

  • Decade of research has elucidated key mechanisms driving synergistic viral-bacterial infections.
  • Insights into these interactions offer new avenues for therapeutic intervention.
  • Potential exists to develop treatments that mitigate bacterial complications by targeting host-pathogen interactions.

Conclusions:

  • Understanding viral-bacterial interactions is crucial for combating severe respiratory infections.
  • Antiviral drug development can be advanced by focusing on these synergistic mechanisms.
  • Novel therapeutic strategies hold promise for improving outcomes in influenza and other viral respiratory diseases.

Related Concept Videos

Antiviral Nucleoside Inhibitors01:22

Antiviral Nucleoside Inhibitors

Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
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.
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Tonsillitis II: Management01:26

Tonsillitis II: Management

This lesson will focus on the different treatment options for managing tonsillitis, which typically depend on the cause and severity.