Pseudomonas aeruginosa
Bacteria. Bacteria are the most common cause of pneumonia in adults. Some people, especially the elderly and those who are disabled, may get bacterial pneumonia after having the flu or even a common cold. Many types of bacteria can cause pneumonia.  Ascariasis is the most common type of worm infection in the world, with an estimated one billion people infected, but it is rare in the U.S. Roundworm's eggs live in the soil and in contaminated feces or bowel movements.  Pseudomonas aeruginosa. Pseudomonas infection is caused by strains of bacteria found widely in the environment; the most common type causing infections in humans is called Pseudomonas aeruginosa. Serious Pseudomonas infections usually occur in people in the hospital and/or with weakened immune systems. Klebsiella species and Escherichia coli (E. coli) are examples of Enterobacteriaceae, a normal part of the human gut bacteria, that can become carbapenem-resistant. In healthcare settings, CRE infections most commonly occur among patients who are receiving treatment for other conditions. The following is a list of the most common infectious diseases throughout the world today. Accurate caseload numbers are difficult to determine, especially because so many of these diseases are endemic to developing countries, where many people do not have access to modern medical care. Symptoms include high fever, coughing, and a maculo-papular rash; common complications include diarrhea, pneumonia, and ear infections. Meningitis: Meningitis, often known as spinal meningitis, is an infection of the spinal cord. It is usually the result of a viral or bacterial infection A condition such as influenza, which is caused by a virus, is generally easy to diagnose because most people are familiar with the symptoms. Other types of viral infections may be harder to diagnose and various tests may have to be performed. The skin can also be infected by a viral infection such as the common wart or chicken pox. Chickenpox is an infectious disease; with most cases occurring in children under age 15, but older children and adults can also get it. It spreads very easily by human contact. Symptoms include itchy rash, fever and headache. Two common types are Staphylococcus epidermis and Staphylococcus aureus. They usually cause mild infections, but these can be more serious in people with cancer. MRSA is a type of Staph aureus infection that standard antibiotics can’t treat. MRSA stands for Methicillin Resistant Staphylococcus Aureus. There is more information about MRSA in our questions about cancer treatment section. Types of Viral Infections. Viruses can affect any part of the body or body system, and can cause infections such as the common cold, flu, gastroenteritis, chicken pox or herpes. The most common type of viral infections involves the respiratory tract. The skin can also be infected by a viral infection such as the common wart or chicken pox. Chickenpox is an infectious disease; with most cases occurring in children under age 15, but older children and adults can also get it. It spreads very easily by human contact. Symptoms include itchy rash, fever and headache. The most common type of viral disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat). Other common viral diseases include: Chickenpox. Flu (influenza). Herpes. Human immunodeficiency virus (HIV/AIDS). Human papillomavirus (HPV). Infectious mononucleosis.  Methicillin-resistant Staphylococcus aureus (MRSA) is a type of staph bacteria that is resistant to certain antibiotics called beta-lactams. These antibiotics include methicillin and other more common antibiotics such as oxacillin, penicillin, and amoxicillin. In the community, most MRSA infections are skin infections. Klebsiella species and Escherichia coli (E. coli) are examples of Enterobacteriaceae, a normal part of the human gut bacteria, that can become carbapenem-resistant. In healthcare settings, CRE infections most commonly occur among patients who are receiving treatment for other conditions.
http://www.nhlbi.nih.gov/health/health-topics/topics/pnu/causes http://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=160&ContentID=54 http://www.cdc.gov/HAI/organisms/organisms.html http://www.infoplease.com/ipa/A0903696.html http://www.nativeremedies.com/ailment/types-of-viral-infections.html http://www.cancerresearchuk.org/about-cancer/coping-with-cancer/coping-physically/fever/cause/infection/types-of-infections http://www.nativeremedies.com/ailment/types-of-viral-infections.html http://www.healthgrades.com/conditions/viral-diseases http://www.cdc.gov/HAI/organisms/organisms.html
most common kind of infection in humans