In Missouri, a strange case of H5-type bird flu has left health officials scrambling to find the source of the virus. The patient, who was hospitalized on August 22, recovered and was released, but not before infecting several healthcare workers. The unusual nature of the case has raised questions about the diligence of the ongoing health investigation.

The patient, who had no known contact with infected animals, is different from the 13 human cases identified so far this year. Those cases all occurred in dairy or poultry farm workers, but Missouri has not reported any bird flu cases in its dairy herds or recent poultry outbreaks.

Health investigators are working to track the virus backward in time to identify the source and forward to identify any potential onward spread. The CDC has provided technical assistance to Missouri officials, but has not been involved in the investigation.

Four more healthcare workers have been identified who experienced mild respiratory illnesses after caring for the patient. None of the four workers were tested for flu at the time of their illnesses, and all have since recovered. The total number of healthcare workers who fell ill after contact with the patient now stands at six.

One of the healthcare workers who developed symptoms was not tested for flu at the time and has since submitted a blood sample to test for bird flu antibodies. A household contact of the patient also fell ill, suggesting a possible common source of the infection.

The illnesses are concerning, given the fear that H5N1 bird flu could begin spreading from human to human and spark a widespread outbreak or even a pandemic. However, it's also possible that other respiratory viruses were present and playing a role.

The slow pace of the health investigation is the most concerning part, according to infectious disease expert Krutika Kuppalli. The CDC is providing technical assistance, but has not been involved in the investigation. The agency has emphasized that only one case of H5N1 bird flu has been detected in Missouri, and no contacts of that case have tested positive for the virus.

Mysterious Bird Flu Case Sparks Concern in Missouri

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