1. Basic terms

Question 1

Parasitism - ?

Answer 1

Association between 2 orgamisms, one of which lives at the expense of the other. Parasite stays in or on the host in order to obtain food, develop and multiply

Question 2

Host

Answer 2

individual susceptible to the parasitosis

Question 3

Final (definitive) host

Answer 3

host in which
the sexual reproduction takes place

Question 4

Intermediate host

Answer 4

host, in which
only asexual reproduction takes place

Question 5

Paratenic host

Answer 5

no reproduction (but accumulation, survival)

Question 6

Vector

Answer 6

organism (usually a blood sucking arthropod) which
plays an active role in transmitting the protozoan parasite

Question 7

Biological vs. mechanical vector

Answer 7

• biological, if there is multiplication (development) in it,
  and its participation in the life cycle is obligatory
• mechanical, when there is only transmission and it plays a facultative role in the life cycle

Question 8

Reservoir

Answer 8

carrying the infection it provides the source for the infection of
the vector, and/or the host

Question 9

Homoxenous species

Answer 9

it has one host during its development

Question 10

Heteroxenous species

Answer 10

it develops in two kinds of participants in its life cycle (excluding paratenic host)
(vector and host, or intermediate and final host)
either obligatorily or facultatively (multichannel development)

Question 11

Why in case of vector-born protozoa we use vector-host and not final-intermediate hosts

Answer 11

Because sexual reproduction can not be attributed
unanimously to one of the life cycle participants -> it is more appropriate to assign a vector and a host role in the life cycle