You can avoid this by cleaning under each piece of furniture everyday and shaking the drapes and hanging clothes. Persistent disturbance of their favorite hiding places send them elsewhere. This can be more effective than spraying. Destroy mosquito breeding hideaways outside your house also. These may be tin cans partially filled with water, empty boxes, lumber, untrimmed bushes, poorly drained washtubs, etc.
Water standing in flower pots is an ideal breeding place for mosquitoes.
It has been said to have your dog vaccinated twice a year. The vaccine that provides immunity for a year or more in temperate climates holds for only six months in the tropics. Better check with your vet for his opinion. Protect your pet with a therapeutic shampoo containing antibacterial, fungal and parasitic properties. Deworm your dog frequently.