CDC: Increase in Cases of Cyclosporiasis Infection Reported

The CDC Health Alert Network issued a health advisory identifying an increase in reported cases of cyclosporiasis in summer 2017.

As of August 2, 2017, 206 cases of infection have been reported to the CDC in individuals who have been infected in the United States and became ill on or after May 1, 2017, which is higher than the number of cases reported by this date in 2016, according to the advisory. The cases have been reported from 27 states, and 18 cases reported hospitalization. No deaths have occurred.

Cyclosporiasis, which is an intestinal illness caused by a parasite is transmitted through consumption of food or water contaminated with theCyclospora cayetanensisparasite. However, direct person-to-person transmission is not possible.

The most common symptom of cyclosporiasis is watery diarrhea, which can be profuse. Other symptoms include anorexia, fatigue, weight loss, nausea, flatulence, abdominal cramping, and myalgia. Symptoms may begin an average of 7 days after infection, and if untreated, the illness can last from a few days to a month or longer.

Cyclosporiasis is treated with trimethoprim/sulfamethoxazole (TMP/SMX). There have been no effective alternative treatments identified.

According to the CDC, investigations to identify a potential source of infection are ongoing and it is too early to determine whether cases of infection in different states are related to each other.

The CDC recommends health care providers to:

· Consider a diagnosis of cyclosporiasis in patients who have prolonged or remitting-relapsing diarrheal illness.

· Specifically order testing forCyclosporaif indicated, whether testing is requested by ova and parasite examination, by molecular methods, or by a gastrointestinal pathogen panel test. The CDC notes that several stool specimens may be required because Cyclospora oocysts may shed intermittently and at low levels.

· Report cases to local health departments.

Reference

Increase in reported cases ofCyclospora cayetanensisinfection, United States, Summer 2017 [news release]. CDC Health Alert Network. CDC’s website.https://emergency.cdc.gov/han/han00405.asp. Accessed August 8, 2017.