Test Description
The Haemophilus Influenzae B Antigen Detection test is designed to identify the presence of the Haemophilus influenzae type b (Hib) antigen in cerebrospinal fluid (CSF.
This Test is crucial for diagnosing invasive Hib diseases, such as meningitis, especially in children under five years of age, where Hib was historically a leading cause of bacterial meningitis.
Haemophilus influenzae is a bacterium responsible for various invasive diseases, particularly in children.
Among its serotypes, Haemophilus influenzae type b (Hib) is the most clinically significant, historically leading to severe infections such as meningitis, epiglottitis, and pneumonia.
Invasive Disease Manifestations
Invasive H. influenzae disease can present in several clinical forms:
- Meningitis: inflammation of the protective membranes covering the brain and spinal cord, often characterized by symptoms such as fever, headache, stiff neck, and altered mental status.
- Bacteremia/Sepsis: A serious bloodstream infection that can lead to systemic inflammatory response syndrome (SIRS).
- Epiglottitis: inflammation of the epiglottis, which can obstruct airflow and is a medical emergency.
- Bacteremic pneumonia: infection of the lungs accompanied by bacteremia.
- Septic arthritis: infection in a joint causing pain and swelling.
- Pericarditis: inflammation of the lining around the heart.
- Cellulitis: A bacterial skin infection that can spread rapidly.
Less common infections include osteomyelitis (bone infection) and endocarditis (infection of the heart lining).
Symptoms
Symptoms of Hib infections vary depending on the site of infection but often include:
- Meningitis: Fever, headache, stiff neck, sensitivity to light (photophobia), and confusion. In infants, symptoms may include irritability, poor feeding, and a high-pitched cry.
- Epiglottitis: Difficulty breathing, drooling, and an extended neck posture to facilitate airflow.
- Pneumonia: Fever, cough, difficulty breathing, and chest pain.
- Septic Arthritis: Swollen, painful joints with redness and warmth.
Complications
Complications from Hib infections can be severe and include:
- Hearing loss
- Neurological damage
- Death in severe cases of meningitis or epiglottitis
Diagnosis
Diagnosis typically involves laboratory testing of blood or cerebrospinal fluid (CSF) to detect Hib bacteria or its antigens. Rapid tests for Hib antigen detection in CSF are crucial for timely diagnosis.
Patient Preparation/Instructions
Patients do not require special preparation prior to this test. However, it is essential to inform healthcare providers about any recent antibiotic treatments, as these can affect test results.
Typical Reference Values
- Negative Result: No Hib antigen detected in CSF.
- Positive Result: Presence of Hib antigen suggests an invasive H. influenzae type b infection.
Turnaround Time
The results for the Haemophilus Influenzae B Antigen detection test are typically available within 24 hours after sample collection.
How To Order This Test In Kenya
To order the Haemophilus Influenzae B Antigen Detection test, please click the ‘Order Test’ button and add it to your cart.
