E-Medicine
Article about bacterial pneumonia, which is caused by a pathogenic infection of the lungs.
http://www.emedicine.com/EMERG/topic465.htm

Medstudents: An Overview
General considerations about pneumonia , giving importance to prevalent agents in different groups of patients.
http://www.medstudents.com.br/pneumo/pneumo6/pneumo6.htm

Pneumocystis Carinii Pneumonia (PCP)
Information resources on this common AIDS-related infection and its treatment from TheBody.com.
http://www.thebody.com/treat/pcp.html

Atypical Pneumonia
Causes, symptoms, and treatments of this condition, also called walking pneumonia. Descriptions of the organisms that commonly cause it.
http://www.nlm.nih.gov/medlineplus/ency/article/000079.htm

Postgraduate Medicine: Pneumonia Symposium
Series on community-acquired pneumonia, covering outpatient care, predicting which patients need inpatient or intensive-care treatment, and the lack of specificity in the "atypical pneumonia" label. Includes discussions of the various pathogens.
http://www.postgradmed.com/issues/1999/04_99/symp_int.htm

eMedicine - Bacterial Pneumonia
Article covering clinical information, diagnosis, and treatment. Includes prescribing information, pictures and X-rays.
http://www.emedicine.com/med/topic1852.htm

eMedicine Health - Bacterial Pneumonia
Consumer health resource center providing an overview and its causes, symptoms and treatment.
http://www.emedicinehealth.com/Articles/17666-1.asp

eMedicine Health - Viral Pneumonia
Consumer health resource center providing information on the causes, symptoms, and treatment of this disorder.
http://www.emedicinehealth.com/articles/15339-1.asp

Bacterial Pneumonia
Consumer health resource center providing information on causes, symptoms, and treatment of bacterial pneumonia. From eMedicine Health.
http://www.emedicinehealth.com/articles/17666-1.asp

Chemical Pneumonia
Consumer health resource center providing information on the causes, symptoms, and treatment. From eMedicine Health.
http://www.emedicinehealth.com/articles/17689-1.asp

MerckSource
Find diagrams of the lungs and respiratory system and information about pneumonia symptoms.
http://www.mercksource.com/pp/us/cns/cns_hl_adam.jspzQzpgzEzzSzppdocszSzuszSzcnszSzcontentzSzadamzSzencyzSzarticlezSz000145zPzhtm

Mayo Clinic: Pneumonia
A description of the disease plus complications, risk factors, diagnosis and treatment.
http://www.mayoclinic.com/health/pneumonia/DS00135

Yahoo! Health - Pneumonia
Health encyclopedia with detailed information: definition, causes, incidence, risk factors, symptoms, signs and tests, treatment and prevention.
http://health.yahoo.com/infectiousdisease-overview/pneumonia-topic-overview/healthwise--hw63870.html