The disease continues to spread in the Americas, with Ecuador and Guyana recently reporting their first cases.
The authors say the finding suggests a risk of sexual transmission but warn against overinterpreting the results.
The CDC received reports of 22 more imported cases over the past week, raising the total to 74 from 5 states.
The case follows two local cases reported in 2023, one in Pasadena and the other in Long Beach.
In a new development, retrospective testing in the Dominican Republic has identified Oropouche cases in samples from people who were negative for dengue.
Relapsing symptoms are a unique feature of the disease, compared to similar illnesses such as dengue and chikungunya.
The CDC has received reports of 11 imported cases and is warning pregnant travelers to affected regions about the risk of severe fetal complications.
The European region has so far reported 19 imported Oropouche virus infections, and the virus has recently been linked to severe fetal outcomes.
Brazilian officials are investigating a virus role in fetal deaths and microcephaly reports.
Officials are investigating the link to two recent miscarriages and have found clues in earlier blood samples and patient outcomes from the 1980s.
