1st ever plague case in Michigan: A follow-up report - Outbreak News Today | Outbreak News Today Outbreak News Today
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In a follow-up to as report Saturday on The Global Dispatch, the Michigan Department of Health and Human Services confirmed a case of bubonic plague in a Michigan resident who recently returned from Colorado in an area with reported plague activity. Plague does not naturally occur in Michigan, and this is the first ever report of plague in a resident of Michigan.

Bipolar staining of a plague smear prepared from lymph aspirated from an adenopathic lymph node, or bubo, of a plague patient./CDC

Bipolar staining of a plague smear prepared from lymph aspirated from an adenopathic lymph node, or bubo, of a plague patient./CDC

The individual is a Marquette county resident, and recovering after receiving appropriate treatment. Public health officials have said there is no concern regarding human-to-human transmission in this case. This is the Michigan’s first plague diagnosis, and the 14th case reported nationally in 2015.

Plague is a rare, life-threatening, flea-borne illness caused by the bacterium Yersinia pestis.  This bacteria occurs in nature among wild rodents and their fleas in rural and semi-rural areas of the western United States.

Nationally, an average of three human cases of plague are reported annually. The western United States is experiencing an increase in reported cases of plague in 2015, with 14 human cases including four deaths reported.  The reason for the increase is not known.

The risk for contracting plague is generally highest in settings that provide food and shelter for rodents, such as campsites, cabins, and other rural or semi-rural settings.

“People who are traveling and recreating outdoors in the western U.S. should be aware of the risk for exposure to plague,” said Dr. Eden Wells, Chief Medical Executive for MDHHS.  “Use insect repellent on your clothing and skin and make sure that any pets that may be along are receiving regular flea treatments.”

People are most often infected when they are bitten by infected fleas or have direct contact with the tissues or body fluids from an infected animal that is sick with plague, which can include domestic pets.  Human-to-human transmission is rare and typically requires direct and close contact with a person with pneumonic plague. Illness typically begins 2-6 days after exposure.

Human plague is a potentially fatal illness characterized by the sudden onset of fever and malaise, which can be accompanied by abdominal pain, nausea, and vomiting.  There are three main forms of plague. Bubonic plague is the most common and results from the bite of an infected flea; patients develop painful swelling of one or several lymph nodes.

Health care providers should consider plague in any patient with compatible signs or symptoms, residence or travel in the western United States, and recent proximity to rodent habitats or direct contact with rodents or ill domestic pets.  Plague is a very serious illness, but is treatable with common antibiotics.  The earlier that a patient seeks medical care and receives treatment, the better the chance for a full recovery.

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