Related Experiment Videos
Epidemiological aspects of antibiotic resistance in respiratory pathogens
G Mlynarczyk1, A Mlynarczyk, J Jeljaszewicz
1Department of Medical Microbiology, Medical University of Warsaw, 5 Chalubinskiego, 02-004, Warsaw, Poland.
Abstract:
Respiratory infections are the most frequent reason for primary health care consultation. The main causes of respiratory tract infections in children are viruses and the most common types are upper respiratory tract infections: common cold, pharyngitis, otitis media and sinusitis. Pneumonia is much more serious. As well as viruses, bacteria are often involved in respiratory tract infections. Three bacterial species are most commonly isolated: Streptococcus pneumoniae, non-encapsulated Haemophilus influenzae and Moraxella (Branhamella) catarrhalis. The most common bacterial cause of pharyngitis is Streptococcus pyogenes. Bacteria isolated from community-acquired infection usually are sensitive to the majority of suitable drugs, but during the past two decades, significant antibiotic resistance has emerged. Resistance to penicillins has spread among H. influenzae and S. pneumoniae. The mechanism of penicillin resistance in H. influenzae is mainly by production of beta-lactamases TEM-1 and ROB-1, whereas in S. pneumoniae resistance is an effect of the changes in penicillin binding proteins. Among respiratory pathogens, resistance to tetracyclines, macrolides, trimethoprim-sulphamethoxazole and fluoroquinolones has also appeared. Several mechanisms depending on changes in target, active efflux and modifying enzymes are involved.
Insights
Respiratory infections are common, often caused by viruses in children. Antibiotic resistance is a growing concern in common bacterial respiratory pathogens.
Area of Science:
- Pediatrics
- Infectious Diseases
- Microbiology
Background:
- Respiratory infections are a leading cause of primary healthcare visits.
- Viral infections, including the common cold, pharyngitis, otitis media, and sinusitis, are most frequent in children.
- Bacterial pathogens like Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis also cause significant respiratory tract infections.
Purpose of the Study:
- To review the causes of respiratory infections, particularly in children.
- To highlight the emergence and mechanisms of antibiotic resistance in key bacterial respiratory pathogens.
- To discuss the implications of increasing antibiotic resistance for treatment.
Main Methods:
- Literature review of common respiratory pathogens and antibiotic resistance trends.
- Analysis of bacterial species frequently isolated from respiratory infections.
- Examination of resistance mechanisms against various antibiotic classes.
Main Results:
- Streptococcus pneumoniae and Haemophilus influenzae show increasing resistance to penicillins.
- Mechanisms of penicillin resistance include beta-lactamase production and altered penicillin-binding proteins.
- Resistance to tetracyclines, macrolides, trimethoprim-sulphamethoxazole, and fluoroquinolones has also emerged in respiratory pathogens.
Conclusions:
- Antibiotic resistance in common respiratory pathogens is a significant and growing public health concern.
- Understanding resistance mechanisms is crucial for effective treatment strategies.
- Continued surveillance and development of new therapeutic approaches are necessary.