Antimicrobial resistance among neonatal pathogens in developing countries

Durrane Thaver1, Syed Asad Ali, Anita K M Zaidi

  • 1Department of Pediatrics and Child Health, Aga Khan University, Karachi, Pakistan.

Insights

Antimicrobial resistance in young infants is a growing concern, with high rates of resistance to common antibiotics like ampicillin and cotrimoxazole. Limited community-based data hinders effective treatment strategies for serious infections in neonates.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Global Health

Background:

  • Antimicrobial resistance (AMR) in pathogens causing serious infections in young infants is critical for public health strategies.
  • Hospital data indicate high resistance rates to ampicillin and gentamicin, WHO-recommended first-line treatments.

Purpose of the Study:

  • To review and synthesize available literature on antimicrobial resistance patterns in young infants (0-90 days) in developing countries.
  • To identify key pathogens and their resistance profiles to inform community-based management.

Main Methods:

  • Systematic literature search for studies published since 1990.
  • Focus on developing countries and community-acquired infections (sepsis, pneumonia, meningitis) in neonates.

Main Results:

  • Limited data: only 10 relevant studies found.
  • High resistance observed: Escherichia coli (72% ampicillin, 78% cotrimoxazole), Klebsiella species (nearly 100% ampicillin, 66% 3rd-gen cephalosporins, 60% gentamicin).
  • Methicillin-resistant Staphylococcus aureus (MRSA) was rare, but 46% resistant to cotrimoxazole.

Conclusions:

  • Community-based AMR data for infant infections are scarce.
  • Significant resistance to cotrimoxazole, gentamicin, and third-generation cephalosporins is concerning.
  • Urgent need for more research to guide effective treatment strategies in developing nations.
Abstract

Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
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...
Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Development of Human Microbiota01:30

Development of Human Microbiota

The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Microbiota Modulation by Antibiotics01:21

Microbiota Modulation by Antibiotics

Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...