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- Title
Potentially Pathogenic Organisms in Stools and Their Association With Acute Diarrheal Illness in Children Aged <2 Years.
- Authors
Mihala, Gabor; Ware, Robert S; Lambert, Stephen B; Bialasiewicz, Seweryn; Whiley, David M; Sarna, Mohinder; Sloots, Theo P; Nissen, Michael D; Grimwood, Keith
- Abstract
Background Acute diarrheal illness (ADI) causes a substantial disease burden in high-income countries. We investigated associations between potentially pathogenic organisms in stools and ADI by polymerase chain reaction (PCR) in Australian children aged <2 years. Methods Children in a community-based birth cohort had gastrointestinal symptoms recorded daily and stool samples collected weekly until their second birthday. Diarrhea was defined as ≥3 liquid or looser than normal stools within a 24-hour period. PCR assays tested for 11 viruses, 5 bacteria, and 4 protozoa. Detections of a new organism or of the same following at least 2 negative tests were linked to ADIs, and incidence rates and estimates of association with ADI were calculated. Results One hundred fifty-four children provided 11 111 stool samples during 240 child-years of observation, and 228 ADIs were linked to samples. Overall, 6105 (55%) samples tested positive for a target organism. The incidence rate of 2967 new detections was 11.9 (95% confidence interval 11.4-12.3) per child-year, with 2561 (92%) new detections unrelated to an ADI. The relative risk of an ADI was 1.5-6.4 times greater for new detections of adenovirus, enterovirus, norovirus GII, parechovirus A, wild-type rotavirus, sapovirus GI/II/IV/V, Salmonella , Blastocystis , and Cryptosporidium , compared to when these were absent. Conclusions Wild-type rotavirus, norovirus GII, sapovirus GI/II/IV/V, adenovirus 40/41, and Salmonella were associated with ADI in this age group and setting. However, high levels of asymptomatic shedding of potential pathogens in stools from children may contribute to diagnostic confusion when children present with an episode of ADI.
- Subjects
CONFIDENCE intervals; DIARRHEA in children; MICROBIAL virulence; POLYMERASE chain reaction
- Publication
Journal of the Pediatric Infectious Diseases Society, 2022, Vol 11, Issue 5, p199
- ISSN
2048-7193
- Publication type
Article
- DOI
10.1093/jpids/piab130