Penicillin-resistant and -intermediate Streptococcus pneumoniae in Saudi Arabia

Area of Science:

• Microbiology
• Infectious Diseases
• Antimicrobial Resistance

Background:

• Streptococcus pneumoniae (S. pneumoniae) is a leading cause of bacterial infections worldwide.
• Antibiotic resistance in S. pneumoniae poses a significant public health threat.
• Data on pneumococcal resistance patterns in Saudi Arabia are crucial for guiding treatment strategies.

Purpose of the Study:

• To analyze the antibiotic susceptibility profile of S. pneumoniae isolates from Saudi Arabia.
• To determine the prevalence of resistance to key antibiotics, including penicillin.
• To identify associations between resistance patterns and inform public health interventions.

Main Methods:

• Analysis of antibiotic susceptibility testing for approximately 400 S. pneumoniae isolates.
• Isolates were collected from various clinical specimens across different regions of Saudi Arabia.
• Minimum Inhibitory Concentrations (MICs) were determined for penicillin and other antibiotics.

Main Results:

• Overall, 6.2% of S. pneumoniae isolates exhibited penicillin resistance, with 51.2% showing intermediate resistance.
• Resistance rates to cefuroxime, clarithromycin, and ceftriaxone were 14.9%, 14.8%, and 4.5%, respectively.
• Penicillin resistance was significantly associated with cefuroxime resistance (p<0.001), indicating co-resistance.

Conclusions:

• The study confirms the presence of penicillin- and multidrug-resistant S. pneumoniae strains in Saudi Arabia.
• These resistant strains demonstrate potential for transmission within the population.
• Enhanced microbiological diagnostics, susceptibility testing, and judicious antibiotic prescribing are urgently needed.