Pandemic influenza a (2009 H1N1) in human immunodeficiency virus-infected catalan children

Antoni Noguera-Julian1, Ana C Provens, Pere Soler-Palacín

  • 1Infectious Diseases Unit, Department of Pediatrics, Hospital Universitari Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain. ton@hsjdbcn.org

Insights

Pandemic influenza (H1N1) in children with human immunodeficiency virus (HIV) showed mild symptoms, with most treated as outpatients. The infection did not negatively impact HIV progression in this vulnerable group.

Area of Science:

  • Pediatric Infectious Diseases
  • Virology
  • Immunology

Background:

  • Limited data exist on 2009 H1N1 influenza in pediatric populations with human immunodeficiency virus (HIV).
  • HIV-infected children represent a vulnerable group susceptible to severe outcomes from novel influenza strains.

Purpose of the Study:

  • To describe the clinical presentation and outcomes of pandemic H1N1 influenza in a cohort of HIV-infected children.
  • To assess the impact of H1N1 influenza on the progression of HIV infection in pediatric patients.

Main Methods:

  • Retrospective case series analysis of 13 HIV-infected children diagnosed with H1N1 influenza.
  • Review of clinical features, treatment (including antiviral use), hospitalization, and HIV disease evolution.

Main Results:

  • Clinical manifestations of H1N1 influenza in HIV-infected children mirrored those in the general population.
  • Most cases were managed with outpatient antiviral therapy, with only 2 requiring hospitalization.
  • Influenza infection did not adversely affect the course of HIV infection.

Conclusions:

  • 2009 H1N1 influenza appears to have an uneventful clinical course in most HIV-infected children.
  • Antiviral treatment is effective in managing H1N1 influenza in this cohort.
  • Pandemic influenza does not seem to alter HIV disease progression in pediatric patients.

Related Concept Videos

Influenza01:27

Influenza

Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
Respiratory Syncytial Virus Disease01:29

Respiratory Syncytial Virus Disease

Human respiratory syncytial virus (RSV) is a widespread pathogen that primarily targets infants and young children but also poses a serious health risk to elderly and immunocompromised individuals. Belonging to the Pneumoviridae family, RSV is a negative-sense, single-stranded RNA virus within the Pneumovirus genus. Its global health burden is significant, with millions of cases annually resulting in hospitalizations and mortality, particularly in resource-limited settings. Although most...
Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...
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.
Cytomegalovirus Disease01:27

Cytomegalovirus Disease

Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
Vaccinations01:51

Vaccinations

Overview