CONTENTS 



PAGE 



4. ENDOLIMAX NANA 63 



5. lODAMCEBA WILLIAMSI 63 



6. DIENTAMCEBA FRAGILIS 64 



III. Host-Parasite Relations between Man and Endamoeha 



histolytica 65 



1. EPIDEMIOLOGY OF TRANSMISSION .... 65 



(i) Infective Stage 65 



(2) Avenue of Infection 74 



2. parasitological and clinical periods . . 83 



3. distribution and localization within the 



host 85 



4. THE primary site OF INFECTION .... 92 



5. SECONDARY SITES OF INFECTION 93 



6. CHANGES IN THE HOST DUE TO THE PRESENCE 



OF THE PARASITE 96 



(i) The Genesis of Symptoms . . . .96 



(2) Pathogenesis 97 



7. resistance and susceptibility of the host 99 



8. immunological reactions 103 



9. changes in the parasite due to residence 



in the host 104 



(i) Aggressivity 104 



(2) Resistance to Drugs 106 



10. host-parasite adjustments during an in- 



fection 107 



(i) The Carrier Condition .... 107 



(2) Latency and Relapse iii 



11. host-parasite specificity 112 



12. prevention and control 116 



IV. Host-Parasite Relations between Man and Other 



Species of Amcrbce 118 



1. endamceba coli 119 



2. ENDOLIMAX NANA I23 



3. lODAMGEBA WILLIAMSI 124 



4. DIENTAMCEBA FRAGILIS I25 



5. ENDAMCEBA GINGIVALIS I25 



CHAPTER III 



INTESTINAL FLAGELLATES 128 



I. Generic Characteristics 128 



I. TRICHOMONAS 128 



xi 



