Stenotrophomonas maltophilia: the significance and role as a nosocomial pathogen

E Senol1

  • 1Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey. esins@gazi.edu.tr

Insights

Stenotrophomonas maltophilia is a challenging pathogen, often affecting hospitalized patients with serious illnesses. Its high antibiotic resistance makes treating infections difficult and requires specialized susceptibility testing.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Clinical Pathology

Background:

  • Stenotrophomonas maltophilia is an opportunistic pathogen.
  • It primarily impacts immunocompromised patients, especially those with malignancies.
  • Prolonged hospitalization and broad-spectrum antibiotic use are key risk factors.

Purpose of the Study:

  • To highlight the clinical significance of Stenotrophomonas maltophilia infections.
  • To emphasize the challenges in treating these infections due to antibiotic resistance.
  • To address the difficulties in antimicrobial susceptibility testing for this organism.

Main Methods:

  • Review of clinical cases and microbiological data.
  • Analysis of antibiotic resistance patterns.
  • Evaluation of diagnostic challenges in susceptibility testing.

Main Results:

  • Stenotrophomonas maltophilia is linked to diverse clinical presentations.
  • High case-to-fatality ratios are associated with these infections.
  • Significant resistance to common antibiotics complicates treatment.

Conclusions:

  • Stenotrophomonas maltophilia poses a substantial threat to vulnerable patient populations.
  • Effective therapeutic strategies are hampered by intrinsic antibiotic resistance.
  • Standardized and accurate susceptibility testing methods are crucial for guiding treatment.

Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Rapid Identification of Pathogens01:25

Rapid Identification of Pathogens

MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
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 I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...