According to wikipedia and Human Parasitology By Burton Jerome Bogitsh, Clint Earl Carter, Thomas N. Oeltmann
Phoresis: In this type of symbiotic relationship, the phoront, usually the smaller organism, is mechanically carried by the other,usually larger organism the host.
So can the host acting as a carrier be called a mechanical vector?
On searching google.books I found some books mentioning:
Like Clinical parasitology
Hosts that transmit parasites to man are vectors. Those that are essential in the life cycle are biologic vectors; those that are not essential are phoretic or mechanical vectors.