No they do not
Vorticella's scientific name is Vorticella campanula.
Some species can cause disease in humans
dysentary
by getting in your bloodstreams
Malaria
Vorticella are unicellular protists.
polio
Ticks are often harmful to humans. For instance, the sheep tick could cause Lyme disease in humans.
Babesiosis is a disease mainly caused by ticks. This disease is similar to malaria and can cause severe anemia.
viruses
One structural difference between Stentor and vorticella is that Stentor is a protozoa. Vorticella is a sessile organism, meaning that it is immobile.