A 10-month-old child attending a child care facility with gastroenteritis is most likely infected with which pathogen?

A 10-month-old child attending a child care facility with gastroenteritis is most likely infected with which pathogen?

• A. Clostridium difficile
• B. Salmonella
• C. Cryptosporidium
• D. Rotavirus

Answer: (D)

Rotavirus is the most likely cause because it is the leading cause of acute gastroenteritis in infants and young children, and daycare centers are common hotspots for its spread. This virus is highly contagious and transmitted via the fecal-oral route, making outbreaks in child-care settings frequent. In a 10-month-old, the typical picture is sudden vomiting followed by watery diarrhea, with dehydration a real concern, which fits rotavirus well. While other pathogens can cause gastroenteritis, their patterns are less characteristic in this setting and age: Clostridium difficile in infants is often just colonization without typical disease symptoms unless there’s antibiotic exposure; Salmonella usually presents with fever and sometimes bloody stools and is more food- or animal-exposure related; Cryptosporidium causes watery diarrhea too but is less strongly associated with the classic day-care outbreak pattern seen with rotavirus.

Rotavirus is the most likely cause because it is the leading cause of acute gastroenteritis in infants and young children, and daycare centers are common hotspots for its spread. This virus is highly contagious and transmitted via the fecal-oral route, making outbreaks in child-care settings frequent. In a 10-month-old, the typical picture is sudden vomiting followed by watery diarrhea, with dehydration a real concern, which fits rotavirus well. While other pathogens can cause gastroenteritis, their patterns are less characteristic in this setting and age: Clostridium difficile in infants is often just colonization without typical disease symptoms unless there’s antibiotic exposure; Salmonella usually presents with fever and sometimes bloody stools and is more food- or animal-exposure related; Cryptosporidium causes watery diarrhea too but is less strongly associated with the classic day-care outbreak pattern seen with rotavirus.