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Association between histo-blood group antigens and Pseudomonas aeruginosa-associated diarrheal diseases
Chih-Hsien Chuang1, Rajendra Prasad Janapatla2, Yi-Hsin Wang2
1Department of Pediatrics, St. Paul's Hospital, Taoyuan, Taiwan; Molecular Infectious Diseases Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; School of Medicine, College of Medicine, Fu-Jen Catholic University, New Taipei, Taiwan.
Insights
Children with blood group A and the Lewis phenotype Le(a+b+) are more susceptible to Pseudomonas aeruginosa-associated diarrheal diseases. Infants exhibit a higher gut colonization rate of this bacterium compared to older children.
Area of Science:
- Microbiology
- Immunology
- Genetics
Background:
- Pseudomonas aeruginosa is an opportunistic pathogen, rarely causing enteric infections.
- The role of human histo-blood group antigens (HBGAs) in P. aeruginosa enteric infections remains uninvestigated.
Purpose of the Study:
- To investigate the association between HBGAs and P. aeruginosa-associated diarrheal diseases in children.
- To determine P. aeruginosa gut colonization rates in different pediatric age groups.
Main Methods:
- Collected stool samples from children to assess P. aeruginosa gut colonization.
- Analyzed saliva samples from patients and healthy children for ABO blood group, FUT2 genotype, and Lewis phenotype (ELISA).
Main Results:
- Infants showed a higher P. aeruginosa colonization rate (6.9%) than children aged 1-2 years (2.3%).
- Blood group A (31.2% vs 17.6%) and Lewis phenotype Le(a+b+) (30.9% vs 16.2%) were significantly more prevalent in children with P. aeruginosa diarrhea.
- No association was found between HBGA status and disease severity.
Conclusions:
- Infants have a higher gut colonization rate of P. aeruginosa.
- Children with blood group A and the Le(a+b+) phenotype are predisposed to P. aeruginosa-associated diarrheal diseases.
Background:
Pseudomonas aeruginosa is not a common enteric pathogen. The association between human histo-blood group antigens (HBGAs) and P. aeruginosa enteric infection has not yet been studied.
Methods:
We collected stool samples from healthy children under 2 years of age for P. aeruginosa gut colonization rate. Saliva samples were collected from patients with P. aeruginosa-associated diarrheal diseases and normal healthy children. Genomic DNA was extracted from saliva samples for ABO blood group typing and FUT2 genotyping. Lewis phenotype was detected using ELISA assay.
Results:
A total of 85 patients with P. aeruginosa-associated diarrheal diseases and 105 healthy children were enrolled for collecting saliva specimens. The stool colonization rate was 5/101 (5%) in healthy children, 4/58 (6.9%) in infants, and 1/43 (2.3%) in children 1-2 years old, respectively. Blood group A was more frequent in patients with P. aeruginosa-associated diarrheal diseases 24/77 (31.2%) than in healthy children 18/102 (17.6%) (P = 0.035). All patients and healthy children were secretor positive. The distribution of weak-secretor genotype Se385/Se385 was 23/84 (27.4%) in patients with P. aeruginosa-associated diarrheal diseases and 17/104 (16.3%) in healthy children, respectively (P = 0.06). Patients with P. aeruginosa-associated diarrheal diseases had a higher percentage of Lea+b+ phenotype 25/81 (30.9%) than healthy children 17/105 (16.2%) (P = 0.018). There was no association between ABO or secretor or Lewis status with the clinical severity of P. aeruginosa-associated diarrheal diseases.
Conclusion:
Infants had a higher gut P. aeruginosa colonization rate than children. Children with blood group A and Lea+b+ phenotype are prone to P. aeruginosa-associated diarrheal diseases.
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