Parainfluenza: Symptoms, diagnosis & treatment
Written by the editorial staff writer at Hola. Medically Reviewed by Dr Nelson Lau, MBBS FRACGP, GP & Digital Health Specialist.

Contents

Parainfluenza refers to a group of viruses that are a part of the paramyxovirus family, commonly responsible for respiratory infections, especially in young children and infants. According to recent data, the incidence rate of human parainfluenza virus (HPIV) is around 0.42 episodes per child-year, with infections occurring throughout the year but peaking in the spring, primarily affecting young children under 2 years old. The viruses causing parainfluenza infections can lead to a range of symptoms, varying from mild to severe, depending on the strain of the virus and the health of the individual. While there is no specific cure for parainfluenza, understanding the symptoms, diagnosis, and treatment options can significantly assist in managing the infection.
What is parainfluenza?
Parainfluenza is a viral infection caused by four viruses belonging to the paramyxovirus family. Each virus produces different signs and diseases. These viruses primarily affect the respiratory system, leading to illnesses such as the common cold, croup, laryngitis, pneumonia, and bronchiolitis. While young children are often most affected, adults can also catch parainfluenza.Types of parainfluenza viruses?
There are four types of parainfluenza viruses (HPIVs). They all cause a respiratory infection, but the type, symptoms and location of the infection are determined by the type of virus involved. Here’s a breakdown of each type:1. HPIV-1 and 2 (Human Parainfluenza Virus Type 1 and 2):
- It mainly causes colds and croup, which are characterised by a barking cough, stridor (high-pitched wheezing), and breathing difficulties, especially in young children.
2. HPIV- 3 and 4 (Human Parainfluenza Virus Type 3 and 4):
- A major cause of bronchiolitis and pneumonia, especially in infants and young children, whereas HPIV-4 is less common and usually associated with mild respiratory symptoms.
What are the symptoms of parainfluenza?
The symptoms of parainfluenza can differ depending on the severity of the infection and the age of the affected individual. Common symptoms include:- Fever
- Coughing
- Barking cough
- Sore throat
- Fatigue
- Runny or stuffy nose
- Breathing difficulties
- Wheezing
- Vomiting
- Nasal congestion
- Low appetite
- Diarrhoea
- Ear pain
- Red or swollen eyes
- Breathlessness
- Wheezing (whistling sound during breathing) and stridor (A high-pitched sound while inhaling, often due to airway narrowing)
- Hoarseness
- Mild body aches
Experiencing these symptoms? Speak with a doctor within 15 minutes.
Is parainfluenza worse than flu?
Both parainfluenza and the flu affect the respiratory system, but the flu is typically more severe. It causes high exhaustion, body aches, and fever and may lead to complications like pneumonia. Parainfluenza is usually milder but may cause severe respiratory problems like croup or bronchiolitis, especially in young children. Although it is generally less intense, it can still be dangerous for vulnerable groups such as infants and those with weakened immune systems. Also read: Difference Between The Flu And The ColdDiagnosis and treatment
Parainfluenza is diagnosed through symptoms, nasal swabs, or chest X-rays. Treatment is supportive and focuses on relieving symptoms, as there are no antiviral medications specifically for parainfluenza.Diagnosis:
Healthcare providers identify parainfluenza by evaluating symptoms such as cough, fever, runny nose, and breathing difficulties. They may conduct a physical examination and listen to the lungs. Sometimes, tests like nasal swabs, throat swabs, or chest X-rays are used to confirm the presence of the virus and eliminate other potential infections.Treatment:
There is no specific treatment for parainfluenza, as it is caused by a virus. The focus of treatment is on alleviating symptoms. Rest, hydration, and over-the-counter pain medications (such as paracetamol or ibuprofen) can help lower fever and relieve discomfort. Steam inhalation and the use of humidifiers may improve breathing, particularly for children. In more severe instances, like croup or pneumonia, hospitalisation with nebullised adrenaline or corticosteroids may be administered to reduce airway inflammation and improve breathing. Antibiotics are ineffective unless there is a secondary bacterial infection.How long does parainfluenza last?
Parainfluenza generally lasts 5 to 10 days, depending on the severity of the infection. Mild instances, such as a common cold, typically improve within a week. Conversely, more severe infections, such as croup or pneumonia, may require a longer recovery time. In certain situations, symptoms like coughing and fatigue can linger for as long as two weeks, particularly in young children or individuals with compromised immune systems.How to stop the spread of infection?
To prevent the transmission of parainfluenza, maintain good hygiene practices. Regularly wash your hands with soap and water, particularly after coughing or sneezing. Refrain from touching your face, as the virus can be transmitted via contact with contaminated surfaces. When coughing or sneezing, use a tissue or your elbow to cover your mouth and nose. Regularly clean commonly touched surfaces, such as doorknobs and phones. If you are feeling unwell, stay at home to avoid spreading the virus to others, especially young children and the elderly. Limit close interactions, like hugging or sharing utensils, with those who are infected. Wearing a mask in crowded areas can further help reduce the spread of the virus. Enhancing your immune system through a balanced diet and sufficient rest supports the immune system, though it does not guarantee prevention of infection.When should I see my healthcare provider?
It is important to consult a healthcare professional if symptoms of parainfluenza become severe or do not show improvement within 10 days. Seek medical help if you experience trouble breathing, wheezing, chest pain, a high fever (above 39°C), bluish discolouration of the lips or skin (cyanosis), or signs of dehydration (such as a dry mouth, infrequent urination, or feeling dizzy). For infants and young children, symptoms such as difficulty in breathing, bluish discolouration around the lips, or a distinctive barking cough may suggest croup or a serious infection that needs immediate attention. Individuals with compromised immune systems, asthma, or chronic lung diseases should also reach out to a doctor if their symptoms escalate. If you are uncertain, it is wise to check with a healthcare provider for advice, particularly if symptoms persist or worsen rather than improve.Questions to ask
When meeting with a healthcare professional regarding parainfluenza, consider inquiring about these topics:- What is the most effective way to alleviate my symptoms?
- How long will my recovery period be?
- Do I need to undergo any tests to verify the infection?
- When should I become worried about worsening symptoms?
- Is there a possibility of complications such as pneumonia or croup?
- How can I ensure that I don't transmit the virus to others?
- Are there any medications or treatments available that could assist?
- What steps can I take to enhance my immune system?
- Should I refrain from any particular activities during my recovery?
- When will it be acceptable for me to resume work, school, or social engagements?
Will telehealth from home help?
Yes, telehealth offers a convenient means to handle parainfluenza symptoms, particularly for mild infections. Hola Health's telehealth platform allows for easy access to healthcare from home. Our offerings consist of:- Telehealth consultations: Patients can speak with qualified doctors online to address symptoms such as cough, fever, or respiratory issues. The doctor will evaluate the condition and suggest a treatment plan.
- Prescriptions online: If medication is required for symptom management, healthcare providers can write prescriptions online. The prescriptions can be collected at a local pharmacy or delivered on the same day.
- Referrals to specialists: Should additional evaluation be required; online doctors can refer patients for diagnostic tests or to a respiratory specialist for further assistance.
- Medical certificates: For individuals needing time off, our service provides same-day and multi-day medical certificates for absences from work or school.
Feeling sick and unsure why? Speak with a GP online in 15 minutes.
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This content is created for informational purposes only. It is not intended to be a substitute for professional medical advice. Always seek the guidance of your doctor or other qualified health professional with any questions you may have regarding your health or a medical condition. For emergencies please immediately contact 000.
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Get affordable healthcare on your terms, with quick access to qualified, Australian-registered telehealth doctors & health practitioners, 24/7, 365 days a year. No more searching for ‘doctors near me‘ – Hola connects you instantly.
Call 000 for emergency or urgent medical help.
Address: 79 St Georges Terrace, Perth WA 6000
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