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Are IBD and GI Infections Worse During Heat Waves?

Summary and Comment |
August 22, 2013

Are IBD and GI Infections Worse During Heat Waves?

  1. Douglas K. Rex, MD

In a large, observational study, hospitalizations for inflammatory bowel disease and infectious gastroenteritis increased with heat-wave durations.

  1. Douglas K. Rex, MD

Heat waves are associated with increases in mortality, commonly reported in patients who are sick or elderly. To examine the effect of heat waves on inflammatory bowel disease (IBD) and infectious gastroenteritis (IG), investigators conducted a retrospective, observational study involving 2030 patients admitted to the University Hospital of Zurich with IBD (738 patients), IG (786 patients), or non-IBD, noninfectious intestinal inflammation (NII; 506 controls). The study period was from 2001 through 2005, during which there were 17 heat waves, defined as ≥6 consecutive days with temperatures ≥9 degrees Fahrenheit above the average daily maximum.

Admissions for IBD rose 34.4% overall during heat-wave periods and 4.6% for each additional day of a heat wave. Admissions for IG, which was not distinguished as bacterial or viral, rose 34.8% overall during heat-wave periods and 4.7% for each additional day of a heat wave; however, the maximum increase in admissions per day was estimated at 7.2% when a 7-day lag in the development of IG was considered. No such lag effect was observed with IBD. NII controls experienced no increase in hospital admissions during the heat waves.

Comment

Presumably, the increases in hospitalizations for infectious gastroenteritis are related to greater environmental growth of pathogens with higher temperatures. The cause of the increase in inflammatory bowel disease hospitalizations is uncertain, and could reflect increased physical stress associated with heat, changes in growth rates of infectious pathogens, or other factors.

  • Disclosures for Douglas K. Rex, MD at time of publication Consultant / Advisory board Exact Sciences; Ferring Pharmaceuticals; Given Imaging; Olympus Speaker’s bureau Boston Scientific; Braintree; Ferring Pharmaceuticals Grant / research support Battelle; Braintree; Northwestern University; Olympus America Editorial boards Annals of Gastroenterology and Hepatology; Comparative Effectiveness Research; Expert Review of Gastroenterology and Hepatology; Gastroenterology; Gastroenterology and Hepatology News; Gastroenterology Report; Gastroenterology Research and Practice; Journal of Clinical Gastroenterology; Techniques in Gastrointestinal Endoscopy; World Journal of Gastroenterology; World Journal of Gastrointestinal Oncology; World Journal of Gastrointestinal Pathophysiology; World Journal of Gastrointestinal Pharmacology and Therapeutics

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Reader Comments (1)

JEFFERSON DICKEY Physician, Internal Medicine, Chicopee Medical Center

I wonder if heat waves increased the dehydration, increasing the likelihood of admission?

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