Infectious Disease
Outbreaks, surveillance, vaccines, and pathogen monitoring.
Michigan cyclosporiasis outbreak tops 1,500 cases, health department says
Michigan’s cyclosporiasis outbreak has reached 1,562 reported cases and 44 hospitalizations, according to MDHHS, which says investigators still have not identified the source.
Over half the cooling towers in NYC Legionnaires' outbreak area issued violations in recent months
Records reviewed by the New York Post show 59% of cooling towers in the Upper East Side outbreak zone received violations over the past year, underscoring compliance problems as the city investigates the source of a Legionnaires' cluster.
Spain confirms first human West Nile fever case of the summer in Alicante
Spain has confirmed its first human West Nile fever case of the summer in Alicante. The patient, a 53-year-old man, was diagnosed on July 1 and has been discharged, while infected mosquitoes were also detected in Seville and Almeria.
H5 bird flu detected in a native Australian seabird for the first time
Australia has confirmed H5 bird flu in a native greater crested tern found dead at Robe Marina, the first detection in a resident Australian seabird. Authorities say there is no evidence of poultry spread or mass bird deaths, while coastal surveillance is being stepped up.
Deadly H5 bird flu detected in a native Australian seabird for the first time
Australian authorities have confirmed H5 bird flu in a greater crested tern on South Australia’s Limestone Coast, the first known detection in a native Australian seabird. Officials say the risk to people remains low and there is still no evidence of spread to poultry.
First local H5 bird flu case confirmed in South Australian seabird
Australia has recorded its first H5 bird flu detection in a local seabird, a greater crested tern found at Robe on South Australia’s Limestone Coast. Officials say the result is concerning but not unexpected, and wildlife surveillance is being expanded to check for further spread.
South Australia confirms H5 bird flu in a native seabird for the first time
South Australia has confirmed H5 bird flu in a native seabird for the first time, after a greater crested tern from Robe Marina tested positive. Two additional wild bird cases were also reported, including giant petrels on Kangaroo Island and near Port Vincent.
CDC investigates multi-state Cyclospora outbreak as Michigan cases top 1,200
The CDC is investigating a fast-moving multi-state Cyclospora outbreak, with Michigan reporting the largest cluster and the source still unidentified.
Legionnaires' disease outbreak in New York City's Upper East Side grows to at least 28 cases
New York City health officials say the Upper East Side Legionnaires' outbreak has grown to at least 28 cases, with contaminated cooling towers the likely source. Inspectors are testing and disinfecting buildings while urging residents with flu-like symptoms to seek medical care.
Taco Bell locations pull ingredients off menu amid cyclosporiasis surge
Some Taco Bell locations, including in Metro Detroit, are temporarily withholding fresh ingredients such as lettuce, pico de gallo, guacamole and cilantro onion amid a widening cyclosporiasis outbreak. Michigan has reported 992 cases and Ohio more than 500, while officials say the source has not yet been identified.
Taco Bell locations pull ingredients amid cyclosporiasis outbreak
Some Taco Bell locations in Metro Detroit have stopped serving lettuce, cilantro onion, pico de gallo and guacamole while health officials investigate a large cyclosporiasis outbreak in Michigan, Ohio and other states.
Cyclosporiasis in Houston: Latest numbers for illness that causes 'explosive diarrhea'
Houston health officials reported more than 30 cyclosporiasis cases this summer, including 16 in the city and 18 more in Harris County. State investigators say they have not identified a common source, while Texas has reported at least 48 cases matching the CDC outbreak definition since May 1.
ECDC Vibrio viewer highlights elevated summer risk at parts of UK and European coasts
The ECDC’s Vibrio Viewer is flagging elevated summer suitability for Vibrio growth across parts of Europe’s coastal waters, including areas near the UK, France and the Netherlands. Officials say the map is an environmental model, not a disease-risk forecast, but it highlights where warm, brackish seas and low salinity can raise concern for wound infections and contaminated shellfish.
Ebola death toll in Congo reaches 600 as cases spread to new provinces
DR Congo’s Ebola outbreak has reached 600 deaths and 1,759 confirmed cases, with suspected spread into Tshopo and Haut-Uele provinces, including two suspected cases in Kisangani.
Colorado confirms 90 cyclosporiasis cases statewide
Colorado public health officials have confirmed 90 cyclosporiasis cases statewide. Most are linked to international travel, and investigators have not identified a common in-state source or outbreak cluster.
What to know about the Legionnaires' disease outbreak in NYC
New York City health officials are investigating a Legionnaires' disease cluster on Manhattan's Upper East Side, centered on Carnegie Hill and Yorkville. The city said 36 cases and 22 hospitalizations had been confirmed, with no deaths reported, and investigators are testing and disinfecting cooling towers.
Ebola death toll in Congo reaches 600 as suspected cases raise spread concerns in new province
Congo’s Ebola outbreak has reached 600 deaths and 1,759 confirmed cases, while health officials investigate suspected infections in Kisangani, a previously unaffected province.
Texas reports 48 cyclosporiasis cases as cryptosporidium appears in Bexar County
Texas health officials reported 48 cyclosporiasis cases from May 1 through July 6, with five hospitalizations and no deaths, while Bexar County separately confirmed at least 10 cryptosporidium cases.
Michigan cyclosporiasis outbreak nears 1,000 cases as Ohio infections rise
Michigan’s cyclosporiasis outbreak reached 992 cases on July 8, with about 40 hospitalizations and no deaths reported. Ohio health officials are also seeing a sharp rise, including 306 cases in Lucas County, as investigators say the outbreaks appear linked but the source remains unidentified.
Michigan cyclosporiasis outbreak nears 1,000 cases
Michigan reported 992 cyclosporiasis cases on July 8, with about 40 hospitalizations and no deaths. Officials say they have not identified the source, and the outbreak is now the largest in state history.
Cyclospora Outbreak Sickens Nearly 2,000 Across U.S., With Michigan Reporting the Most Cases
A multistate cyclospora outbreak has sickened nearly 2,000 people across at least 20 states, with Michigan reporting 992 cases and the largest share of illnesses. Federal and state health officials have not identified the source, but produce remains the leading investigative focus.
NYC cyclosporiasis cases rise to 273, with city and federal agencies still searching for the source
New York City has confirmed 273 cyclosporiasis cases since May 1, according to reporting published July 8, as city, state, CDC and FDA investigators continue searching for the source.
Michigan cyclosporiasis outbreak tops 300 cases as investigators search for source
Michigan health officials say more than 300 cyclosporiasis cases have been confirmed across at least seven counties, with investigators still searching for the source and warning that more illnesses are likely.
WHO adds first Ebola Bundibugyo diagnostic test to its emergency list
WHO has added the first molecular diagnostic test for Bundibugyo Ebola virus to its Emergency Use Listing, a move reported July 3, 2026 that could speed confirmation of cases in Congo and Uganda.