6 Signs of Respiratory Infection and Tests to Detect It

Dr.Akshay Budhraja, 3 mins read

Respiratory infections are very common particularly during the rainy season or winter. These infections mainly affect our lungs, throat, and airways, and they can be caused by bacteria, viruses, or fungi. Someof the symptoms of respiratory infections are mild, like the common cold, while others signs like pneumonia, can be serious. So, it is important to know the signs of a respiratory infection for receiving the right treatment at the right time. 

In this blog, we will explore 6 common signs of respiratory infections and the investigations which our doctors perform to diagnose them. 

1. Cough

This is one of the most common signs of a respiratory infection. A person can have a dry cough or a cough with mucus, called phlegm. If the mucus is yellow or green, it could mean the infection is bacterial. A cough can last for several days or even weeks, depending on the infection.

2. Fever

A fever is our body’s way of fighting against infection. If you have a high temperature (above 100.4°F or 38°C), it may be a sign that your body is trying to kill viruses or bacteria. Fever is often seen with other symptoms like chills, sweating and body aches.

3. Shortness of Breath

If you feel like it is hard to breathe or you can’t get enough air, you could be having a respiratory infection. This symptom is more common in serious infections like bronchitis or pneumonia. People with asthma or COPD may feel worse during such infections.

4. Chest Pain or Discomfort

Pain in your chest when you breathe deeply, cough, or lie down can also be a sign of a respiratory infection. It usually happens when the infection spreads to your lungs or the lining around the lungs.

5. Sore Throat

Many upper respiratory infections start with a sore throat. It may feel scratchy, painful, or dry. This is often followed by sneezing, a runny nose, or a cough.

6. Fatigue and Weakness

When your body fights an infection, it uses a lot of energy. This can make you feel tired, weak, or sleepy. Fatigue is a common sign in both mild and serious respiratory infections.

 Diagnostic Tests For Respiratory Infections

If you show signs of a respiratory infection, your doctor may suggest a few tests to find out the cause and decide on the best treatment. Here are some common tests:

1. Chest X-ray

It helps doctors to check if you have pneumonia or other lung problems. It is quick, painless, and useful for checking how serious the infection is.

2. Blood Tests (CBC)

A Complete Blood Count (CBC) shows how many white blood cells are in your blood. A high number can mean your body is fighting an infection. It also helps to know whether the infection is likely viral or bacterial.

3. Throat Swab or Nasal Swab

In this test, the doctor uses a small cotton swab to collect a sample from your throat or nose. This helps identify which virus or bacteria is causing the infection, such as COVID-19, influenza, or strep throat. 

4. Sputum Test

If you are coughing up mucus, your doctor may ask you to provide a sample. This is sent to a lab to check for bacteria or fungi. This test helps find out the right antibiotic if needed.

5. Pulse Oximetry

This simple test checks how much oxygen is in your blood. It uses a small device clipped to your finger. Low oxygen levels can mean your lungs are not working properly due to infection.

6. CT Scan (if needed)

If the infection is serious or if an X-ray is not clear, your doctor may recommend a CT scan of your chest. This gives a more detailed image of your lungs and helps in complex cases.

Conclusion

Respiratory infections can range from mild colds to serious lung problems. If you notice symptoms like cough, fever, shortness of breath, or chest pain, you can consult our expert pulmonologists at Aakash Healthcare Super Speciality Hospital, Dwarka for best treatment and care. With the right tests and treatment, most respiratory infections can be managed well.