Chorioamnionitis and funisitis due to Corynebacterium kutscheri

Area of Science:

• Microbiology
• Neonatal Infections
• Bacterial Pathogenesis

Background:

• Diphtheroids are generally considered commensal organisms in the female genital tract.
• Corynebacterium kutscheri is recognized as a pathogen primarily in laboratory rodents.
• The potential for commensal organisms to act as pathogens, especially in vulnerable hosts, is an area of clinical interest.

Purpose of the Study:

• To report a rare case of Corynebacterium kutscheri isolation from an infant.
• To investigate the presence and implications of C. kutscheri in a neonatal setting.
• To emphasize the importance of considering commensals as potential pathogens in specific clinical circumstances.

Main Methods:

• Isolation of C. kutscheri in pure culture from an infant's umbilical cord and surface sites.
• Histological examination of the umbilical cord and fetal membranes.
• Assessment of the fetal cellular response to the identified organisms.

Main Results:

• Corynebacterium kutscheri was successfully isolated as a pure culture from the umbilical cord and other sites on the infant.
• Histological analysis confirmed the presence of C. kutscheri within the fetal tissues of the umbilical cord and membranes.
• A fetal cellular response was observed in reaction to the presence of the bacteria.

Conclusions:

• Corynebacterium kutscheri can be a pathogen in human neonates, not just laboratory animals.
• The isolation of C. kutscheri from the umbilical cord suggests potential vertical transmission or intra-uterine infection.
• This case highlights the critical need to recognize commensal bacteria as potential pathogens in neonates with altered host resistance or other risk factors.