918 
criminals, etc. His long association with man as friend and com- 
panion and the various ways in which he helps man has blinded 
altogether too many people to the damage he does to mankind. The 
cat is a valuable aid in the destruction of certain household pests 
such as mice. Various other carnivores are domesticated or semi- 
domesticated and trained to the hunt. 
E. Carnivores as scavengers. — In practically every country both 
cats and dogs act as scavengers around the home, visiting the slop 
pails. In some countries semiwild dogs roam the streets and are 
important factors as scavengers. The question as to whether or 
not they become infected from the garbage pails depends upon the 
particular meat which they find; for instance, in case they eat pork 
or rats and mice, both cats and dogs are Hable to become infected with 
trichiniasis, but since these two carnivores are not ordinarily used 
as food, they cannot play an important role in the spread of this 
disease to man. 
The reliability qf host determinations. — See p. 414, Bui. 152. Un- 
doubtedly, some of the Latin names cited by authors on basis of the 
vernacular names cited by other authors are suh judice. Nevertheless 
we have quoted in this bulletin the Latin names in question since they 
are matters of pubHc record. In an effort to record under the proper 
Latin names of the hosts parasites for which we have found only 
vernacular names of the hosts, we have encountered the greatest of 
difficulty. Generally we have entered these under an indefinite 
entry such as Felis species, Canis species, etc. It is to be taken for 
granted that some of the entries will prove to be duplicates and some 
sub judice. But it has been impossible to avoid this condition in view 
of the indefinite nature of certain original reports. 
The following is a list of animal parasites which are reported 
both for carnivores and for man. Some of these parasites are more 
or less common in man, some are very rare, some are purely experi- 
mental either in man or in the carnivores. 
t23 to t212. PROTOZOA— 
t37. Endamoeha coli exp., [dispar^ 
exp.], dysenteriae ^, gingivalis, his- 
tolytica. 
t39. Endolimax phagocytoides. 
t88. Leishmania archibaldi exp., 
hraziliensis exp., donovani, furun- 
culosa infantum, tropica. 
t94. Trypanosoma hrucei, gambiense, 
ninae-kohl-yakimov ^ exp., rhode- 
siense 
t95. Schizotrypanum cruzi. 
flSl. Trichomonas buccalis exp., 
hominis exp. 
tl39. Giardia enterica, intestinalis 
lamblia exp. 
tl42/. Treponema ^ aboriginale, eury- 
gyratum, icterohaemorrhag- 
iae, icteroides ^, interrogans 
exp., microgyratum exp., 
morsus-muris, pallidum 
exp., vincenti. 
Pseudospirochaetes species 
Brumpt exp. 
Spirochaeta ' species Kermo- 
gant exp. 
tl61. Isospora belli exp., bigemina, 
rivolta. 
