[Flora in the anterior nares of patients in the neurologic ward: the influence of nasogastric intubation and mechanical ventilation].

MRSA has been isolated frequently from patients in the neurologic ward of Minami-Okayama Hospital. We examined the flora in the anterior nares of 37 patients in the neurologic ward and 36 patients in the medical ward. Existence of dysphagia and nasogastric intubation is considered to make a marked difference between nasal flora of neurologic patients and that of medical patients. Patients with nasogastric intubation had higher incidences of colonization with S. aureus, and gram-negative rods. All patients colonized with MRSA had received nasal tube-feeding. Nasogastric intubation is considered to be a significant risk factor for MRSA colonization. The study in patients with nasogastric intubation demonstrated that patients with mechanical ventilation had a significantly higher incidence of colonization with gram-negative rods, such as P. aeruginosa, and a lower incidence of colonization with S. aureus. A incidence of MRSA colonization in patients with mechanical ventilation was significantly low. Mechanical ventilation is not necessarily considered to be a risk factor for MRSA colonization.