SAN DIEGO -- A man diagnosed with hepatitis A is suing a La Mesa eatery that is being investigated in connection with an outbreak of the disease.

Terry Wesley became infected with the illness after eating in March and April at the Chipotle Mexican Grill on Fletcher Parkway in La Mesa, according to his attorney.

Wesley claims in his lawsuit that he became sick on April 24, is still sick, and has not been able to go back to work.

The news came as a new hepatitis A case was reported.

San Diego County health officials said they have identified another case of hepatitis A that might be linked to the La Mesa restaurant, bringing the total number of people sickened to 21.

Officials said Tuesday that they are still trying to find the source of the outbreak.

Those who became ill ate at the restaurant between March 1 and April 22.

Hepatitis A is a viral infection that attacks the liver and is spread by fecal contamination of water or food.

Symptoms include nausea, diarrhea, fever, fatigue, dark urine and jaundice.