biostudies-literatureKorpe PNational Institute of Allergy and Infectious DiseasesNIAID NIH HHSNational Institutes of HealthNIH HHS2178-2186https://www.ebi.ac.uk/biostudies/studies/S-EPMC10273363biostudies-literatureUnknown76(12)<h4>Background</h4>Cryptosporidium spp. are responsible for significant diarrheal morbidity and mortality in under-5 children. There is no vaccine; thus, a focus on prevention is paramount. Prior studies suggest that person-to-person spread may be an important pathway for transmission to young children. Here we describe a longitudinal cohort study of 100 families with infants to determine rates of cryptosporidiosis within households during the coronavirus disease 2019 (COVID-19) pandemic.<h4>Methods</h4>Families living in Mirpur, Bangladesh, with 1 infant aged 6-8 months were enrolled and followed with weekly illness survey and stool testing for Cryptosporidium for 8 months.<h4>Results</h4>From December 2020 to August 2021, 100 families were enrolled. Forty-four percent of index children aClinical infectious diseases : an official publication of the Infectious Diseases Society of AmericaProspective Cohort Study of Cryptosporidium Infection and Shedding in Infants and Their Households.PMC102733635R01AI146123R01 AI146123Ni ZDuggal PMunday RMKorpe PFerdous TAra RKabir MAlam MHaque RfalseProspective Cohort Study of Cryptosporidium Infection and Shedding in Infants and Their Households.<h4>Background</h4>Cryptosporidium spp. are responsible for significant diarrheal morbidity and mortality in under-5 children. There is no vaccine; thus, a focus on prevention is paramount. Prior studies suggest that person-to-person spread may be an important pathway for transmission to young children. Here we describe a longitudinal cohort study of 100 families with infants to determine rates of cryptosporidiosis within households during the coronavirus disease 2019 (COVID-19) pandemic.<h4>Methods</h4>Families living in Mirpur, Bangladesh, with 1 infant aged 6-8 months were enrolled and followed with weekly illness survey and stool testing for Cryptosporidium for 8 months.<h4>Results</h4>From December 2020 to August 2021, 100 families were enrolled. Forty-four percent of index children a2023-01-01T00:00:00Z2023 Jun2026-06-03T17:24:16.077Z2025-04-05T00:00:45.48ZS-EPMC102733633675049110.1093/cid/ciad059