Brazil has identified Zika in the saliva and urine of two patients infected by the virus.
The Oswaldo Cruz Foundation made the announcement on Friday, adding further studies are needed to determine if those fluids could transmit the infection.
Scientists at the foundation said it is the first time the virus has been detected in saliva and urine.
There has already been concern that Zika could be transmitted by sexual contact. Scientists are researching reports earlier this week that an American had transmitted the virus to a sexual partner in Texas.
Brazilian health officials also said on Thursday they had confirmed two cases of transmission through blood transfusions.
