Weekly Rounds: Cyclosporiasis, Bundibugyo Ebola, and More

This week on Infection Control Today^® (ICT^®), outbreak response dominated the conversation — from a rapidly expanding parasitic foodborne illness now confirmed in more than half the country, to a viral hemorrhagic fever exposing a critical gap in the global vaccine arsenal. Alongside those urgent headlines, a landmark regulatory shift in environmental disinfection technology and a candid look at public perceptions of preparedness rounded out a week that underscored just how many fronts infection preventionists are managing simultaneously.

Cyclosporiasis Reaches Crisis Proportions: 1,645 Cases, Midwestern Cluster Under Investigation

The week's most urgent story continued to build. As of July 13, the CDC has confirmed 1,645 domestically acquired cases of cyclosporiasis across 34 states since May 1, with an additional 5,100 cases still awaiting analysis. By comparison, only 249 cases had been confirmed nationally by the same date last year. A multistate cluster of 400-plus cases concentrated in Michigan, Ohio, West Virginia, and Kentucky is now under active investigation, with lettuce and salad greens under scrutiny as a potential common food source. For infection preventionists, two clinical details stand out: standard disinfectants will not eliminate Cyclospora cayetanensis, and the parasite is routinely missed in standard stool panels without a specific laboratory order.

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What IPs Need to Know About Cyclospora Right Now

Complementing the outbreak update, ICT published 2 practical resources for clinicians and infection prevention professionals. One piece walks through how Cyclospora cayetanensis spreads, the IP role in surveillance, outbreak reporting, and collaboration with public health authorities — framing this as a full IPC response, not just a clinical diagnosis challenge. A second article focuses on frontline guidance: food safety counseling for patients, symptom recognition, when and how to order the appropriate diagnostic test, and prevention strategies during an active outbreak.

Read: IP-focused overview | Read: Practical steps

Bundibugyo Ebola: Why Existing Vaccines Don't Protect Against This Strain

The ongoing Ebola outbreak in the Democratic Republic of the Congo took on new urgency this week with an important vaccine clarification. ICT explained why the approved Ebola vaccines — developed for the Zaire strain — offer no protection against the Bundibugyo strain driving this outbreak. Health care workers and at-risk communities are currently relying on supportive care while researchers test promising new vaccine candidates and therapeutics. For IPs monitoring this situation, the article outlines what comes next in vaccine development and what preparedness posture remains appropriate for U.S. facilities.

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Public Preparedness Post-COVID-19: Why the Public Is Still Worried — and Why That Matters

In a candid interview published Monday, Norris Gearheart, CR, executive vice president of Regulatory Business Practice at First Onsite, explored why U.S. citizens remain anxious about infectious diseases years after COVID-19. The conversation touched on public perceptions of Ebola, measles, vaccination hesitancy, environmental contamination, and disaster recovery — and examined how education, preparedness infrastructure, and environmental hygiene can strengthen public health resilience. For IPs who engage with communities or lead facility preparedness planning, the piece offers useful perspective on the gap between scientific risk assessment and lived public fear.

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Contact Tracing as an IPC Core Competency (July 10): Brenna Doran, PhD, CIC, used the ongoing Bundibugyo Ebola outbreak as a case study to explain why contact tracing — rapid case identification, exposure assessment, contact monitoring, and community engagement — remains one of infection prevention's most powerful tools. The piece is worth sharing with teams who haven't revisited contact tracing protocols since COVID.

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