What are the signs that indicate a case of complicated measles?

The signs indicative of a case of complicated measles include clouding of the cornea and deep or extensive mouth ulcers. Measles can lead to severe complications, especially in malnourished children and those with weakened immune systems. The clouding of the cornea is associated with keratitis, which can lead to vision loss, while deep or extensive mouth ulcers indicate significant mucosal involvement and increase the risk of secondary infections.

The other signs listed, such as high fever and rash, persistent cough and wheezing, and abdominal pain and diarrhea, can be associated with measles but do not specifically highlight the serious complications that arise from the disease. While high fever and rash are common symptoms of measles, they do not alone indicate a complicated case. Persistent cough and wheezing suggest respiratory involvement, potentially indicating bronchopneumonia, which is a common complication but not as serious as corneal clouding or extensive mouth ulcers. Abdominal pain and diarrhea can also occur in some cases but are not defining signs of complicated measles. Thus, the combination of clouding of the cornea and extensive mouth ulcers indeed marks a severe presentation of the disease.