Many viruses cause breathing problems, with common culprits including Influenza (Flu), Respiratory Syncytial Virus (RSV), Adenovirus, and Rhinovirus, as well as newer ones like the virus causing COVID-19. These viruses affect the nose, throat, and lungs, leading to symptoms like coughing, wheezing, shortness of breath, and fever, with RSV being particularly severe in infants and older adults, and COVID-19 potentially causing pneumonia.
Symptoms of a respiratory tract infection include:
Lung infection symptoms
Bronchitis is usually caused by viral infection, such as adenovirus, rhinovirus, influenza, parainfluenza, and respiratory syncytial virus (RSV). Less common is caused by bacteria such as mycoplasma and chlamydia.
Specific causes can include:
Common respiratory viruses include influenza, enterovirus, respiratory syncytial virus (RSV) and adenovirus.
Common viral illnesses include colds, the flu, COVID-19, norovirus (“stomach flu”), HPV (warts) and herpes simplex virus (cold sores).
Respiratory viruses include rhinoviruses and enteroviruses (Picornaviridae), influenza viruses (Orthomyxoviridae), parainfluenza, metapneumoviruses and respiratory syncytial viruses (Paramyxoviridae), coronaviruses (Coronaviridae), and several adenoviruses. With the exception of adenoviruses, all possess an RNA genome.
Acute viral URI last on average 7 to 11 days but symptoms may linger up to 21 days. However, the most contagious period is during the first 2 or 3 days that a person has symptoms, and rarely after 1 week. Who gets acute URI? Anyone can get URI.
Getting plenty of rest, drinking fluids and using over-the-counter medications can help you feel better and aid recovery. For most people, testing for influenza or other infections won't change your treatment plan.
Early symptoms are similar to influenza symptoms: fever, a dry cough, headache, muscle pain, and weakness. Within a day or two, the symptoms typically get worse, with increasing cough, shortness of breath and muscle pain. There may be a high fever and there may be blueness of the lips.
COVID-19 infections can cause lung damage that leads to pneumonia, acute respiratory distress syndrome (ARDS) or scarring. The damage is caused by an immune-system overreaction that can lead to too much inflammation.
In checking for pneumonia, your doctor will listen for abnormal sounds like crackling, rumbling or wheezing. If your doctor thinks you may have pneumonia, an imaging test may be performed to confirm the diagnosis.
Symptoms of COVID-19
a new, continuous cough – this means coughing a lot for more than an hour, or 3 or more coughing episodes in 24 hours. a loss or change to your sense of smell or taste. shortness of breath. feeling tired or exhausted.
Respiratory viruses may affect both the upper respiratory tract (the vocal cords and above) and the lower respiratory tract (below the vocal cords). Some viruses that affect the nose and throat can progress to cause serious lung infections, such as pneumonia.
Initial signs of RSV are similar to mild cold symptoms, including sneezing, runny nose, fever, cough and decrease in appetite. Very young infants may be irritable, fatigued and have breathing difficulties. These symptoms do not usually all show up at the same time, instead they come in stages.
Viral infections often develop gradually, such as a cold that starts with a scratchy throat and progresses to a cough and congestion. Bacterial infections, however, tend to appear suddenly and with more intensity. For example, strep throat can cause a severe sore throat and high fever that comes on quickly.
COVID-19 is caused by infection with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The coronavirus spreads mainly from person to person, even from someone who is infected but has no symptoms.
Amoxicillin (50 mg/kg/day) alone or with clavulanate is the first choice in moderate and severe presentation respectively. Alternative initial antibiotics include cefaclor (40-50 mg/kg/day) and cefuroxime-axetil (30 mg/kg/day) or cefpodoxima-proxetil (8 mg/kg/day) respectively.
The flu virus affects the nose, throat and lungs, and can lead to serious lung infections, such as pneumonia. Other common types of respiratory viruses include rhinovirus/enterovirus, parainfluenza, respiratory syncytial virus and adenovirus.
Walking pneumonia symptoms to look for:
Using precautions for the next 5 days can help reduce this risk. After this 5-day period, you are typically much less likely to be contagious. However, some people, especially people with weakened immune systems, can continue to spread the virus for a longer period of time.
Rabies virus has a characteristic bullet-shaped virion structure. Rabies virus infection in mammals is nearly 100% fatal if left untreated.
Healthcare professionals prescribe antivirals to treat life-threatening or chronic (long-term) viral infections including: COVID-19. Ebola. Influenza (flu)