What causes a viral upper respiratory infection?

What causes a viral upper respiratory infection?
I have one, and I was wondering what exactly causes it?

Best answer:
A virus !

It could be one of the viruses that causes a cold or the flu, or viral pneumonia, or someother virus. That's WHY it's called viral rather than bacterial.

Add your own answer in the comments!

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Upper Respiratory Infection Pathophysiology - Effects and Therapy

URI is a kind of respiratory infection, generally referred to as common cold. Mostly,it is caused by intrusion of bacterium or viral elements that attack the respiratory tracts.

Pathophysiology:

In common cold, the mucous membrane is assailed upon. It happens through being close to an affected person by virtue of his extracts, or by particles of phlegm disposed during gentle coughs. It is therefore advisable to keep your mouth under wraps while coughing, or keeping your face away during sneezing. This obviates the splay of URI to gentry.

Once a pathogen enters the body, it must overcome particular barriers before causing disease. These barriers include:

- Nose hair

- Mucus

- Cells with cilia located in the lower part of the respiratory tract

- Stomach acids

These hurdles work on the premise to ensnare the alien intruders to minimize the percentage of acquiring cold or flu. Basal Respiratory Passage have cells containing cilia that catch and fetch pathogens to pharynx, from where they are gulped down and brought forth to the stomach. This is where they get completely destroyed by the various digestive juices that are present in the stomach.

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Your throat lumps and tonsils:

The adenoids and tonsils help to defend against disease causing pathogens due to their immune cells that respond to foreign invaders. These cells include: Macrophages, Monocytes, Neutrophils and Eosinophils.

The general scope of nasopharyngeal passage that comprises of staph and strept even defend from pathogens. People with defective immunity, like AIDS, are in grave danger of contagion factor as their immunity is found grossly deficient.

Conversely, pathogens have their own protection to fight back. They have the ability to manufacture toxins and proteases, as well as the ability to form capsules to prevent annihilation by phagocytic cells.

Incubation periods vary among the types of pathogens. Rhinoviruses and flu can take up to 5 days to incubate. Others, such as pertussis and take up to 10 days or as long as three weeks before symptoms present themselves. Epstein-Barr incubation period can be up to 6 weeks.

What are the symptoms of an upper respiratory infection?

People who have never suffered from URIor upper respiratory infection are affected by following manifestations:

- Runny nose

- Head congestion - Feels like there is a hug cork jammed into the middle of your face

- Nasal congestion - Caused by swollen nasal passages that have slammed completely shut

- Chest congestion - Bronchial airways clogged with mucus

- Coughing

- Sneezing

- Sore, scratchy throat

- Hoarseness

- Fever

Treatment:

The way to cure URI is to bring about a reduction in the symptoms. Colds are generally affected by virus, which antibiotics cannot counter. These medicines are effective against bacterium problems only. If you suffer from URI, you may take recourse to OTC medicines for cough, nasal flow, constriction, high temperature to mitigate manifestations and allow patients to breathe easy.

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