Coronation Street character Joseph Brown will be diagnosed with Lyme disease after he collapses at home.
In scenes that will air next week, the youngster, played by William Flanagan, will be rushed to hospital.
Doctors tell his worried parents and grandparents that he has the illness, probably contracted from a tick bite while on a camping holiday.
The plotline follows weeks of worry and trips to the doctor.
Joseph's stepmother, Gemma, played by Dolly-Rose Campbell, was removed from the house by social services under suspicion of deliberately poisoning her stepson.
Both Gemma and Joseph's father, Chesney, played by Sam Aston, are relieved to discover the disease is treatable and Joseph will make a good recovery.
The soap has worked closely with the charity Lyme Disease UK, who have been consulted on scripts regarding symptoms and treatment.
The most well-known symptom of Lyme disease is an Erythema Migrans rash, which is a circular expanding rash that can appear between three days and three months after a bite.
However, approximately 30% of people who contract Lyme disease do not produce a rash.
Other symptoms can include fatigue, muscle and joint pain, headaches, fever and chills, neck stiffness, nausea and digestive issues, while facial palsy, when one side of the face drops, can also occur, especially with children.
Julia Knight, a retired specialist practitioner paediatric nurse, who volunteers with Lyme Disease UK, said: "It has been my great pleasure to work with the Coronation Street scriptwriters to give them advice and pointers so that they could produce a storyline that is both realistic and engaging.
"Lyme disease can easily be overlooked if a person only shows viral-type symptoms initially, as in the storyline. Raising awareness of the disease and giving people the information about how to prevent it is essential.
"With knowledge, bites can be prevented, and awareness of possible symptoms means that people who do contract the disease can seek medical advice promptly."
Coronation Street airs Mondays, Wednesdays and Fridays on ITV and Virgin Media One.
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Source: Press Association
