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Lake Dallas High School.

A student at Lake Dallas High School has been diagnosed with pertussis, or whooping cough, officials said Wednesday.

Denton County Public Health epidemiologist Briar Deen sent a letter to parents asking them to review their immunization records to ensure they and their children have received all of their shots, and track any potential symptoms.

No additional information about the confirmed case of whooping cough was released.

Whooping cough is a highly contagious bacterial infection that can cause difficulty breathing, especially for infants.

It generally begins with a mild fever, cold, runny nose, sneezing and a cough that progressively worsens. After that, coughing fits can last for six weeks, and babies often have difficulty sleeping, eating and breathing. Adults and vaccinated children generally experience milder systems.

No student with pertussis should return to school until he or she has completed five days of antibiotics, Deen said.

This comes on the heels of a measles case being diagnosed in Denton County, which was announced Wednesday by DCPH.

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