41+ Risk Factors For Bacterial Pneumonia PNG . Coinfection with h1n1 influenza increases the risk of secondary bacterial pneumonia, with s pneumoniae the most likely coinfection. Pneumonia — learn about the symptoms, causes and treatment of this serious lung infection. Community-acquired pneumonia - American Nurse Today from www.americannursetoday.com Streptococcus pneumoniae (pneumococcus) is a bacterial pathogen that affects children and adults worldwide. You can also get these types of pneumonia by coming into contact with surfaces or objects. Bacteria, a virus, or even fungi can trigger pneumonia. It's usually caused by a bacterial infection. Bacterial pneumonia is a complication in approximately one third of patients with severe influenza, resulting in intensive care unit (icu) admission.2 diagnosing coinfection can in the last few seasons, coinfection in patients in the icu