122 



MICROBES AND TOXINS 



during speech or coughing (Fliigge). Water-supplies convey 

 the cholera vibrio and the typhoid bacillus. Along with garden 



natfetis 



Fig. 40. Amoeba Amoeba viriais). 

 (After Gruber.) 



FIG. 41. An amoeba dying full 

 of parasites. 



SphcuwptuyQ 

 applying .its fir 

 loihe infitsortan 



ct&tfidium 



FIG. 42. Green euglena enclosing 

 . a chytridium (lower fungus). 

 (Metchnikoff.) 



^ two parasitic 



' ~ 



FIG. 43. Infusorian attacked by 

 acinetian parasites (Spfuzro- 

 phrya). (Metchnikoff.) 



earth the tetanus spore may gain access to a wound ; the soil 

 may spread anthrax spores over sheep pastures. The foods 

 which are eaten raw (milk, meat, vegetables) convey what they 

 have gathered from the soil or from the bodies of animals. 



