Peer-reviewed veterinary case report
Long-Term Follow-Up After Acute Gastroenteritis Caused by Giardia Infection in Juvenile Dogs.
- Journal:
- Journal of veterinary internal medicine
- Year:
- 2025
- Authors:
- Walz, Karla C et al.
- Affiliation:
- Clinic for Small Animal Medicine
- Species:
- dog
Plain-English summary
A study looked at young dogs who had a Giardia infection, which caused them to have severe stomach issues. Researchers found that these dogs were more likely to have ongoing stomach problems and intense itching later in life compared to healthy dogs. Specifically, 29% of the dogs with a past Giardia infection had chronic intestinal signs, while only 10% of the healthy dogs did. Additionally, dogs that had more severe diarrhea during their initial illness and were treated with metronidazole (an antibiotic) were at a higher risk for these long-term issues. Overall, the study suggests that young dogs who experience acute gastroenteritis due to Giardia may face increased chances of ongoing gastrointestinal problems and itching as they grow older.
Abstract
BACKGROUND: In humans, there is a high prevalence of postinfectious irritable bowel syndrome (IBS) after acute giardiasis. OBJECTIVE: To evaluate the prevalence of chronic gastrointestinal and dermatologic signs in dogs after acute Giardia-associated gastroenteritis. ANIMALS: Forty-nine dogs with acute gastroenteritis and confirmed Giardia infection and fifty control dogs without a history of acute giardiasis. METHODS: Retrospective longitudinal study. Data were collected from dogs with acute gastrointestinal signs and confirmed Giardia infection at a young age (< 9 months) and from healthy controls matched by breed, sex, and age. After a minimum follow-up period of 12 months, dog owners completed a questionnaire assessing chronic gastrointestinal and dermatologic signs later in life. Severity of chronic disease was quantified using a modified canine inflammatory bowel disease activity index (CIBDAI). Univariable logistic regression was used to compare frequencies of chronic signs between groups. RESULTS: Dogs with acute giardiasis at a young age had a higher prevalence of chronic intestinal signs (Giardia 29%, 14/49; controls 10%, 5/50; p = 0.03) and pruritus (Giardia 33%, 16/49; controls 8%, 4/50; p = 0.01) later in life than did control dogs. A high canine acute diarrhea severity (CADS) index during acute enteritis, combined with metronidazole treatment, increased the risk of developing chronic gastrointestinal signs (p = 0.04). CONCLUSION AND CLINICAL IMPORTANCE: Juvenile dogs with acute gastroenteritis and confirmed Giardia infection had a higher prevalence of pruritus and chronic gastrointestinal signs. Severe enteritis and metronidazole administration may increase the risk of developing chronic gastrointestinal signs.
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