Los Angeles County health officials say that the case was reported in a resident of El Monte and that there is no known relation between them and the other four patients.

The County of San Diego is investigating the first ever case of locally acquired dengue. The Escondido resident who became sick with dengue did not travel to

No additional locally acquired cases have been identified, although there have been at least 49 reported cases of travel-related dengue in the county this year, according to officials.

The illness appeared in an Escondido resident who had not recently traveled anywhere that the mosquito-borne illness is common. The arrival of dengue in San Diego County does not come as a surprise,

San Diego County health officials Sunday reported their first case of locally acquired dengue virus, contracted by an Escondido resident.

Symptoms of dengue often mirror those of other viruses, and health officials urged healthcare providers to be vigilant.

In this week's Medical Roundup, Dr. Michael Daignault talks about the locally acquired dengue cases seen in LA County as well as new CPR guidelines.