Uh…, for obvious reasons, you don’t do human feeds with infected mosquitoes, only colony mosquitoes that are known to be pathogen-free*.
For the most part, mosquitoes don’t emerge from the egg carrying pathogens (this does occur at low frequency with some viruses). To get infected mosquitoes, we feed them on blood spiked with the pathogen through a membrane feeder. This is done under biosafety containment conditions.
*Except under very rare specialized circumstances, like when you feed Plasmodium-infected mosquitoes on people to give them malaria, to test a drug or vaccine (yes, this is actually done!). However, my lab doesn’t work on these kind of experiments.