=Blatta= sp. Hair worm: _Gordius aquaticus_, p. 201. Insects: _Evania appendigaster_, p. 236. _Tetrastichus hagenowii_, p. 250.
=Blattella germanica= and/or =Blattella vaga= Viruses: Unspecified strains of poliomyelitis virus, p. 103.
=Blattella germanica= Bacteria: _Achromobacter_ sp., p. 110. _Aerobacter aerogenes_, p. 111. _Aerobacter cloacae_, p. 112. _Alcaligenes faecalis_, p. 111. _Alcaligenes viscosus_, p. 111. _Bacillus circulans_, p. 120. _Escherichia coli_, p. 112. _Escherichia freundii_, p. 113. _Micrococcus aurantiacus_, p. 106. _Micrococcus epidermidis_, p. 106. _Micrococcus pyogenes_ var. _albus_, p. 107. _Micrococcus pyogenes_ var. _aureus_, p. 107. _Micrococcus ureae_, p. 107. _Micrococcus_ sp., p. 108. _Mycobacterium leprae_, p. 123. _Paracolobactrum aerogenoides_, p. 113. _Paracolobactrum coliforme_, p. 113. _Paracolobactrum_ sp., p. 113. _Pseudomonas aeruginosa_, p. 104. _Sarcina symbiotica_ (host may have been _B. orientalis_), p. 108. _Salmonella typhimurium_, p. 116. _Serratia marcescens_, p. 117. _Streptococcus faecalis_, p. 109. _Streptococcus_ sp., p. 110. Fungi: _Aspergillus flavus_, p. 130. _Aspergillus tamarii_, p. 130. _Aspergillus_ sp., p. 130. _Cordyceps blattae_, p. 134. _Herpomyces ectobiae_, p. 135. _Memnoniella echinata_, p. 132. _Saccharomyces_ sp., p. 133. Protozoa: _Bodo_ sp. (host may have been _P. americana_), p. 167. _Coelosporidium periplanetae_, p. 185. _Dobellina_ sp. (host may have been _P. americana_), p. 177. _Endamoeba blattae_ (host may have been _P. americana_), p. 177. _Endolimax_ sp. (host may have been _P. americana_), p. 180. _Entamoeba coli_ (host may have been _P. americana_), p. 178. _Entamoeba histolytica_ (host may have been _P. americana_), p. 179. _Entamoeba thomsoni_, p. 179. _Eutrichomastix_ sp. (host may have been _P. americana_), p. 169. _Gregarina blattarum_, p. 182. _Iodamoeba_ sp. (host may have been _P. americana_), p. 180. _Lophomonas blattarum_, p. 172. _Lophomonas striata_, p. 173. _Nyctotherus ovalis_, p. 188. _Peltomyces periplanetae_, p. 177. _Plistophora periplanetae_, p. 186. _Tetratrichomastix blattidarum_, p. 170. Helminths: _Blattelicola blattelicola_, p. 193. _Blatticola blattae_, p. 193. _Enterobius vermicularis_, p. 209. _Galebia aegyptiaca_, p. 195. _Gongylonema neoplasticum_, p. 206. _Moniliformis kalahariensis_, p. 203. _Prosthenorchis elegans_, p. 203. _Prosthenorchis spirula_, p. 203. _Tetrameres americana_, p. 207. _Trichuris trichiura_, p. 210. Mites: _Blattisocius tineivorus_, p. 216. _Caloglyphus_ sp., p. 218. Undetermined, p. 220. Insects: _Brachygaster minutus_, p. 235. _Eupelmus atriflagellum_, p. 247. _Dolichurus corniculus_, p. 261. _Ripidius pectinicornis_, p. 232. Mammals: _Callithrix chrysoleucos_, p. 285. _Callithrix jacchus_, p. 285. _Cebus apella_, p. 284. _Lemur coronatus_, p. 283. _Lemur fulvus_, p. 283. _Leontocebus oedipus_, p. 285. _Leontocebus rosalia_, p. 285. _Leontocebus ursulus_, p. 285. _Macaca sylvanus_, p. 286. _Nasua narica_, p. 288. _Nasua nasua_, p. 288. _Pan_ sp., p. 286. _Perodicticus potto_, p. 284. _Saimiri sciurea_, p. 285.