PARASITOLOGY

CONTENTS

Series editor’s preface ix

1 Introduction to Parasitology 1

1.1 Parasites and parasitism 1

1.1.1 Methods of invasion and escape 2

1.1.2 Life-cycles 4

1.1.3 Multiplicative phases 4

1.2 The nature of parasitism 5

1.3 Parasites’ effect upon the host 7

1.3.1 Mechanical damage 8

1.3.2 Migration within the host 8

1.3.3 The parasite’s feeding activity 9

1.3.4 Toxins 10

1.3.5 Immunosuppression 10

1.4 Host–parasite reactions 10

1.4.1 Pathology due to host response 11

1.4.2 Pathology due to parasite numbers 11

1.5 Parasite life-cycles 11

1.5.1 One host only, no asexual multiplication and no

internal accumulation 12

1.5.2 Life-cycles in which no sexual reproduction has

been observed but there is asexual multiplication

and internal accumulation 12

1.5.3 Life-cycles with both sexual and asexual

reproduction without change of host and with

internal accumulation 13

1.5.4 Life-cycles with both sexual and asexual

reproduction without change of host but without

internal accumulation 13

1.5.5 Parasites with a sexual phase in one host and

larval development but no asexual or internal

accumulation in the intermediate host 14

1.5.6 Asexual reproduction with internal accumulation

but no sexual reproduction and no external phase 15

1.5.7 Life-cycles with two changes of host but without

any internal accumulation 15

1.5.8 Life-cycles that have more than one host with both

sexual and asexual phases and internal accumulation 15

1.5.9 Life-cycles using three hosts 16