At 9:30 this morning, fire and rescue were dispatched to 705 Pineburr Place. This is in the Greyson's Green subdivision, near Southern High School.
Preliminary test results on the suspicious package are negative, meaning nothing harmful was detected.
A sample of the powdery substance was sent to the SBI for further analysis.
Durham Fire Department's PIO says the woman received the package on May 6 but just opened it today.
Police officials say the woman became sick when she received some packages from her estranged husband who is a microbiologist.
The fire department cordoned off the area, but there are no evacuations. Neighbors surrounding the home were told to stay inside their homes while the situation was investigated.