WHO monitors cases of pneumonia in Argentina

The WHO is monitoring a cluster of 10 cases of pneumonia of unknown cause in Argentina

The cases are linked to a private clinic in the city of San Miguel de Tucumán, in the northwest of the country

The preliminary report on Tuesday included five health care workers and a patient being treated in the clinic's intensive care unit

Local health officials reported three more cases on Thursday, bringing the number to 9, including three deaths

Symptoms include fever, muscle and abdominal pain, and shortness of breath

PAHO said. Biological samples were sent to the Argentine National Administration of Laboratories and Institute of Health for additional testing

Dr. Michael Osterholm, an infectious disease expert said that the lungs are heavily involved

He first suspected Legionnaires' disease, which is caused by inhaling droplets of water containing Legionella bacteria

PAHO and WHO are monitoring the epidemic and assisting local health officials with the investigation