[Two cases of invasive Haemophilus influenzae type f infection]

Jette Dettmann Nielsen1, Jens Wentzel Lind, Britta Bruun

  • 1Paediatrisk Klinik, Rigshospitalet, DK-2100 København Ø. jettjeff@dadlnet.dk

Ugeskrift for Laeger
|January 29, 2009
PubMed

Insights

Invasive Haemophilus influenzae type f infections, though rare, can cause serious illness like meningitis and bacteremia. Awareness of non-type b strains is crucial for effective treatment, even with widespread Hib vaccination.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pediatrics

Background:

  • Widespread vaccination against Haemophilus influenzae type b (Hib) has significantly reduced invasive Hib disease in children.
  • Physicians rely on vaccination programs to control common bacterial infections.

Observation:

  • Two cases of invasive Haemophilus influenzae type f infection were observed: a neonate with meningitis and an elderly woman with arthritis and bacteremia.
  • These cases highlight infections caused by a non-vaccine-targeted strain of H. influenzae.

Findings:

  • Haemophilus influenzae type f can cause severe invasive disease in both pediatric and adult populations.
  • The incidence of invasive Hib disease has decreased due to vaccination efforts.

Implications:

  • Healthcare providers must maintain awareness of non-type b invasive H. influenzae infections.
  • Diagnostic and treatment strategies should consider non-type b strains of H. influenzae.
  • Continued surveillance for non-type b H. influenzae is important for public health.

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...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
Bacterial Meningitis01:24

Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic01:26

Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic

Healthcare-associated infections (HAIs) occur in a healthcare facility while a person receives care for another ailment. This category also includes work-related infections among healthcare staff.
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies. Common...