|MadSci Network: Medicine|
A pneumonia is an infection of the lungs. Pneumonias can be caused by a variety of pathogens, including bacteria, viruses, and even molds or certain parasites (less common in industrialized countries). There are many strains (types) of bacteria that cause Pneumonia... some of them include..
1. Community-acquired pneumonias (pneumonia contracted outside the hospital). Pneumonia in this setting can be caused by a virus (such as the influenza virus), it can also follows a viral respiratory infection, such as a common cold caused by a rhinovirus. These types of pneumonia affect millions of adults each year. Common bacterial causes of pneumonia include Streptococcus pneumoniae, the most common pneumonia-causing bacteria. Other organisms, that are called "atypical bacteria" (not as common), include species such as Mycoplasma pneumoniae.
2. Hospital-acquired pneumonia: A pneumonia that is contracted within the hospital is called nosocomial [no-so-co-me-all] pneumonia. Patients in hospital are generally ill to begin with, and are thus particularly vulnerable to other kinds of bacterial species including Klebsiella pneumoniae and staphylococci, which can be very dangerous.
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