Mendocino County Health Officer Dr. Marvin Trotter said Friday that a 25-year-old Mendocino County resident contracted the virus, and was showing a mild illness of influenza-like symptoms.
Trotter said the patient is recovering without any treatment of antiviral therapy.
Lake County's first H1N1 case was reported on June 29.
Dr. Karen Tait, Lake County's health officer, told Lake County News in an interview at that time that the new flu virus' unpredictable aspects include a propensity for spreading during the summer, at a time when the traditional flu usually doesn't appear.
The Centers for Disease Control said there have been 40,617 H1N1 cases in the United States and its territories, with 263 deaths.
California has had 3,161 cases – placing it third nationwide behind Wisconsin and Texas – and 52 deaths, placing second behind New York.
Trotter said the H1N1 influenza virus continues to cause mild illness and sometimes severe illness in persons worldwide. Symptoms include fever (100 degrees Fahrenheit), cough and/or sore throat, body aches, and diarrhea and/or vomiting.
Children and adults with underlying medical conditions such as respiratory, cardiac, HIV, cancer, chronic steroid use or women who are pregnant may be at higher risk to become ill and have severe illness, Trotter said.
Infected persons are assumed to be contagious the day before symptom onset and through seven days after onset of symptoms, according to health officials.
Trotter said if a person experiences any of these symptoms is it is recommended that they contact their doctor, stay home from work, school and social gatherings for approximately seven days.
He urged people to cover their cough, wash their hands with soap and water, use alcohol-based hand sanitizer when no hand washing source is available, get rest, reduce stress and eat healthy in order to reduce the risk of contracting the H1N1 flu this summer.
