Related Experiment Video
Updated: Sep 26, 2026

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
Published on: September 20, 2020
[Alexander Project--5 years in Poland]
Abstract:
The aim of the Alexander Project is to monitor resistance and its trends among the most common bacterial pathogens responsible for community-acquired lower respiratory tract infections and to compare the results obtained between different countries. In Poland, from 1996 to 2000 the percentage of Streptococcus pneumoniae isolates non-susceptible to penicillin was 14.1%. Most often decreased susceptibility to penicillin co-existed with resistance to other classes of antibiotics (multi-drug resistance). The biggest number of pneumococci were resistant to co-trimoxazole (35.2%) and doxycycline (33.6%). Of Haemophilus influenzae isolates, 5.3% produced beta-lactamases. All H. influenzae isolates were susceptible to amoxicillin/clavulanic acid and 3rd-generation cephalosporins. Many isolates of this species were resistant to co-trimoxazole (19.1%). The results of the Alexander Project provide crucial data for guiding national recommendations for empirical treatment of respiratory tract infections.
Insights
The Alexander Project tracked antibiotic resistance in Poland from 1996-2000. Key findings include high rates of multi-drug resistance in Streptococcus pneumoniae and significant co-trimoxazole resistance in Haemophilus influenzae.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- The Alexander Project monitors bacterial pathogens causing community-acquired lower respiratory tract infections.
- This study focuses on antibiotic resistance trends in Poland between 1996 and 2000.
Discussion:
- Streptococcus pneumoniae exhibited 14.1% non-susceptibility to penicillin, often alongside multi-drug resistance.
- High resistance rates were observed for co-trimoxazole (35.2%) and doxycycline (33.6%) in S. pneumoniae.
- Haemophilus influenzae showed 5.3% beta-lactamase production, with 19.1% resistance to co-trimoxazole.
Key Insights:
- Penicillin non-susceptibility in Streptococcus pneumoniae was prevalent, frequently associated with multi-drug resistance.
- Co-trimoxazole and doxycycline emerged as significant resistance concerns for pneumococci.
- Haemophilus influenzae displayed notable resistance to co-trimoxazole, though remained susceptible to amoxicillin/clavulanic acid and third-generation cephalosporins.
Outlook:
- Data from the Alexander Project are vital for informing national guidelines on empirical treatment of respiratory infections.
- Continued monitoring of antimicrobial resistance is crucial for effective public health strategies.
- Understanding resistance patterns aids in optimizing antibiotic stewardship and patient care.
Related Concept Videos
The Stanford Prison Experiment
Robbers Cave
Le Chatelier's Principle: Changing Concentration
Bond Energies and Bond Lengths