Related Experiment Video
Updated: Oct 1, 2025

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic
Published on: November 7, 2020
Achromobacter xylosoxidans Purulent Bronchitis in a Previously Healthy Child: An Unexpected Consequence of COVID-19
Nusa Matijasic1, Ana Tripalo Batos2, Jasna Lenicek Krleza3
1Department of Pediatric Oncology and Hematology, Children's Hospital Zagreb, Zagreb, HRV.
Insights
Achromobacter xylosoxidans caused severe bronchitis in a healthy teen after mild COVID-19. This highlights how viral infections can predispose individuals to bacterial complications.
Area of Science:
- Microbiology
- Infectious Diseases
- Pulmonology
Background:
- Achromobacter xylosoxidans is a Gram-negative bacterium known for antimicrobial resistance.
- It is typically found in immunocompromised patients or those with cystic fibrosis.
- Bacterial coinfections can complicate viral respiratory illnesses.
Observation:
- A previously healthy 14-year-old girl presented with prolonged cough and dyspnea after a mild viral respiratory infection.
- Bronchoscopy revealed bilateral purulent bronchitis.
- Achromobacter xylosoxidans was identified in bronchoalveolar lavage samples.
Findings:
- The patient tested positive for coronavirus disease 2019 (COVID-19).
- The mild COVID-19 infection created conditions favorable for A. xylosoxidans proliferation.
- A. xylosoxidans was determined to be the causative agent of the purulent bronchitis.
Implications:
- This case underscores the potential for secondary bacterial infections following even mild viral respiratory illnesses.
- It highlights the importance of considering bacterial coinfections in patients with persistent respiratory symptoms post-viral infection.
- Further research may explore the mechanisms by which viral infections predispose to A. xylosoxidans.
Abstract:
Achromobacter xylosoxidans is an aerobic, Gram-negative rod with a broad intrinsic and acquired antimicrobial resistance, usually isolated in patients with cystic fibrosis (CF), immunodeficiencies, or those undergoing invasive procedures. We report a case of a previously healthy 14-year-old girl who was hospitalized in our institution due to a prolonged, progressive cough and exertional dyspnea, which started after a mild viral respiratory tract infection. To elucidate the cause of her symptoms, a bronchoscopy was finally performed, showing bilateral purulent bronchitis caused by A. xylosoxidans, isolated from bronchoalveolar lavage (BAL) sample. Since the patient had positive serological testing for coronavirus disease 2019 (COVID-19), we concluded that it was the initial viral infection, although of a mild clinical course, the one that created favorable conditions for proliferation and further inflammation caused by A. xylosoxidans.
Related Concept Videos
Acute Pharyngitis
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Pneumonia II: Pathophysiology
Pulmonary Cycle: Exhalation
Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia III: Complications and Assessment
Acute Respiratory Failure-I
Definition: It is defined by specific criteria based on blood gas measurements. Hypoxemia happens when the partial pressure of oxygen (PaO2) falls below 60 mmHg. At the same time,...

