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Asymptomatic neonatal colonisation by Clostridium difficile
Insights
Asymptomatic Clostridium difficile colonization is common in newborns, with nearly 31% of infants colonized. This early-life colonization, often transient, may establish neonates as reservoirs for potential infection.
Area of Science:
- Neonatal microbiology
- Infectious disease epidemiology
Background:
- Clostridium difficile is a significant cause of healthcare-associated infections.
- Neonatal colonization patterns and implications are not fully understood.
Purpose of the Study:
- To investigate the prevalence and characteristics of Clostridium difficile colonization in neonates.
- To identify potential sources and risk factors for neonatal C. difficile acquisition.
Main Methods:
- Prospective survey of infants in a maternity unit.
- Collection of fecal samples at multiple time points (week 1, day 14, day 28).
- Strain typing and environmental cultures to assess acquisition routes.
Main Results:
- 47% of infants had C. difficile in week one; 30.7% over the study month.
- No maternal acquisition; colonization unrelated to delivery mode, sex, feeding, or antibiotics.
- Environmental acquisition suggested by similar strains in infants and positive cultures.
- Colonization was often transient, intermittent, and asymptomatic, with low toxin production.
Conclusions:
- Transient Clostridium difficile colonization is common in neonates.
- Neonates may serve as reservoirs for C. difficile infection.
- Further research into neonatal colonization and environmental factors is warranted.
Abstract:
In a prospective survey of infants born in a single maternity unit, asymptomatic faecal colonisation by Clostridium difficile occurred in 31 (47%) of 66 babies who provided a faecal sample during week one of life and at age 14 and 28 days, and in 46 (30.7%) of the total of 150 babies for whom at least one faecal sample was obtained during the month of study. There was no evidence for acquisition of the organism from the mother during delivery and colonisation was unrelated to the means of delivery, infant sex, means of feeding, duration of hospital stay, or antibiotic treatment. New colonisation occurred throughout the month of the study and further evidence for environmental acquisition was obtained by the finding of a similar strain of C difficile in 7 babies from one ward together with positive environmental cultures. Colonisation was frequently transient and occasionally intermittent; most infants kept the same strain during their period of carriage. Twenty two (47.8%) babies colonised by C difficile had low titres of cytopathic faecal toxin but none had symptomatic diarrhoea or features of necrotizing enterocolitis. The in vitro toxigenic potential of 57 toxigenic isolates from 36 babies was low and 12 babies carried non-toxigenic strains. Transient colonisation by C difficile in early life is almost certainly more common than is generally recognized and the neonate provides an important reservoir of potential infection.