Causes and Risk Factors of Acute Bronchitis

Acute bronchitis is a very common respiratory diseaseAcute bronchitis can also be the consequence of
that generates symptoms such as mucus-producingbacterial infections. Common bacterial agents
cough, chest discomfort and pain, difficult and shallowresponsible for causing acute bronchitis are:
breathing, wheezing and fever. One of the mostStreptococcus pneumoniae, Haemophilus influenzae,
commonly diagnosed respiratory diseases in the UnitedBordatella pertussis, Bordatella parapertussis and
States, acute bronchitis is responsible for causing anBranhamella catarrhalis. In some cases, the disease
estimated 2.5 million new cases of breathingcan also be triggered by mycoplasmas, infectious
insufficiency each year. Although it has the highestorganisms that share the characteristics of both
incidence in people with ages over 50, acute bronchitisviruses and bacteria. When acute bronchitis is caused
can be seen in young adults and children as well.by infection with mycoplasmas, the disease is usually
Acute bronchitis refers to inflammation of the bronchialsevere, has a rapid onset and generates very
mucosal membranes, triggered by various externalpronounced symptoms. Some forms of mycoplasma
irritant or infectious agents. Due to prolonged exposurebronchitis can even be life-threatening. Common
to irritants, pollutants or due to infection with viruses oratypical bacterial agents (mycoplasmas) responsible
bacteria, the bronchial region becomes inflamed,for causing acute bronchitis are: Mycoplasma
resulting in overproduction and expectoration of mucus.pneumoniae, Chlamydia pneumoniae and Legionella.
Mucus is a substance produced by the soft tissuesSometimes, acute bronchitis can also be caused by
and membranes involved in breathing. It has a veryinfection with fungal organisms such as Candida
important role in protecting the respiratory tract againstalbicans, Candida tropicalis, Blastomyces dermatitidis,
irritants and infectious organisms. However, in the caseHistoplasma capsulatum and Coccidioides immitis.
of acute bronchitis, overproduction of mucus is anWhen acute bronchitis is the result of bronchial
inflammatory reaction of the respiratory tract due toinfection with fungal elements, the disease is generally
irritation of the bronchia. An excessive production ofless serious and generates mild to moderate
mucus leads to obstruction of the airways, causingsymptoms.
wheezing and shallow, accelerated, difficult breathing.Non-infectious factors that can lead to the occurrence
There is a wide range of factors that can lead to theof acute bronchitis are: dust, pollen, chemicals, pollutants,
occurrence of acute bronchitis. The most commoncigarette smoke, substances with strong, irritant odor
cause of acute bronchitis is infection with viruses. The(alcohol, paints, benzene). When acute bronchitis is
viral organisms responsible for triggering thesolely the result of exposure to non-infectious irritant
manifestations of acute bronchitis are: adenovirus,agents, the disease is usually less severe and
influenza virus, parainfluenza virus, coronavirus,generates mild to moderate symptoms. In this case,
coxsackievirus, enterovirus, rhinovirus and respiratorythe medical treatment is focused towards alleviating
syncytial virus. Commonly developed by children, viralthe clinical manifestations of the disease. Patients are
forms of acute bronchitis are usually less serious andusually prescribed bronchodilators or cough
generate milder symptoms (mild to moderate fever,suppressants for decongestion of the airways and
non-severe cough and less pronounced obstruction ofrapid symptomatic relief.
the airways).