How to determine if it is a Pseudomonas aeruginosa infection
Dec 03, 2025
Source: Cainiu Health
Dr. Li Feng
Introduction
To determine whether an infection is caused by Pseudomonas aeruginosa, a comprehensive assessment can be made based on characteristics of the infected site, properties of secretions, pathogen culture results, imaging findings, and the patient's underlying health condition. Combining these clinical indicators can improve diagnostic accuracy. If symptoms suggestive of infection appear and progressively worsen, or if there is a history of high-risk exposure, prompt medical evaluation is recommended.
To determine whether an infection is caused by Pseudomonas aeruginosa, a comprehensive assessment can be made based on characteristics of the infected site, appearance of secretions, pathogen culture results, imaging findings, and the patient's underlying health status. Combining these clinical indicators can improve diagnostic accuracy. If symptoms suggestive of infection appear and progressively worsen, or if there is a history of high-risk exposure, prompt medical evaluation is recommended.
1. Characteristics of the infected site: Infections in different locations present differently. Skin infections may show redness, swelling, ulcers with purulent discharge; respiratory tract infections are characterized by cough and yellow-green sputum; urinary tract infections manifest as frequent and urgent urination accompanied by cloudy urine; eye infections present with eye pain and increased secretions.
2. Appearance of secretions: Secretions from Pseudomonas aeruginosa infections are typically yellow-green or bluish-green, thick in consistency, and often have a distinctive foul odor. This characteristic serves as one of the key clues for initial suspicion of the infection.
3. Pathogen culture results: Bacterial culture of secretions, blood, or body fluids collected from the infected site can confirm the diagnosis if Pseudomonas aeruginosa is isolated. Drug susceptibility testing can also be performed simultaneously to guide treatment.
4. Imaging findings: In respiratory infections, chest X-ray or CT may reveal pulmonary inflammatory infiltrates, with severe cases showing abscesses or pleural effusion. Ultrasound in skin and soft tissue infections may demonstrate local edema or fluid accumulation.
5. Patient’s underlying condition: Individuals with compromised immunity—such as those on long-term antibiotics or corticosteroids, hospitalized patients, burn victims, or those with a history of invasive procedures—are at higher risk for Pseudomonas aeruginosa infection. Clinical judgment should take patient history into account.
Good personal hygiene should be maintained in daily life. Avoid exposing broken skin or mucous membranes to contaminated environments. Use antibiotics appropriately to prevent the development of resistance. High-risk individuals should enhance protective measures. After infection, promptly clean secretions and keep the affected area dry and clean to promote recovery.
