Generally speaking, no.
Poison ivy spreading is caused by coming in contact with the
rash-causing oil, urushiol. Once a poison ivy or oak rash
appears (i.e., within 1-3 days), the original oil has all bonded to
the skin, so it can't be spread to others.
If you experience poison ivy rash spreading after this time, it
is most likely you are coming in contact with the oil again and
possibly through secondary contamination. It is not uncommon for
urushiol to be picked up from the surface of an item that has come
in contact with a poison plant. Urushiol can stay on surfaces such
as tools, gloves, boots, or even a pet's fur for quite a long
The best practice to avoid spreading the rash is to wash the
area with a cleanser designed to remove urushiol such as Tecnu
Original Outdoor Skin Cleanser. Tecnu Original can also be used to
remove urushiol from secondary sources of contamination such as
tools, gloves, boots and fur.
For more information, see our Infographic
"Unexpected Sources of Poison Ivy/Oak Rash"