Pseudomonas
More than 25 species of Pseudomonas cause diseases in humans. Species such as Pseudomonas aeruginosa, Pseudomonas fluorescens, Pseudomonas putida, Pseudomonas cepacia, Pseudomonas stutzeri, Pseudomonas maltophilia, and Pseudomonas putrefaciens are said to cause opportunistic infections in humans.  Opportunistic infections more commonly affect people with weak immune systems compared to the ones with stronger immune system. Only two of the species are known to cause specific disease. These are Pseudomonas mallei and Pseudomonas pseudomallei which cause glanders and melioidosis respectively. However, the most common species involved in clinical problems is Pseudomonas aeruginosa. The common clinical problems caused by Pseudomonas aeruginosa is shown in the following bullet points.