=Periplaneta americana= Viruses: Unspecified strain(s) of poliomyelitis virus (host may have been _P. brunnea_), p. 103. Bacteria: _Achromobacter hyalinum_, p. 110. _Aerobacter aerogenes_, p. 111. _Aerobacter cloacae_, p. 112. _Aerobacter_ sp., p. 112. _Alcaligenes faecalis_, p. 111. _Bacillus cereus_, p. 120. _Bacillus megaterium_, p. 121. _Bacillus subtilis_, p. 122. _Bacterium alkaligenes_, p. 119. _Clostridium_ sp., p. 122. _Eberthella oedematiens_, p. 112. _Escherichia coli_, p. 112. _Escherichia freundii_, p. 113. _Escherichia intermedium_, p. 113. _Mycobacterium friedmannii_, p. 123. _Mycobacterium lacticola_, p. 123. _Mycobacterium leprae_, p. 123. _Mycobacterium phlei_, p. 123. _Mycobacterium piscium_, p. 124. _Mycobacterium_ sp., p. 124. _Nocardia_ sp. (?), p. 124. _Paracolobactrum aerogenoides_, p. 113. _Paracolobactrum coliforme_, p. 113. _Paracolobactrum_ sp., p. 113. _Proteus mirabilis_, p. 114. _Proteus morganii_, p. 114. _Proteus rettgeri_, p. 114. _Proteus vulgaris_, p. 114. _Proteus_ sp., p. 114. _Pseudomonas aeruginosa_, p. 104. _Pseudomonas fluorescens_, p. 105. _Salmonella anatis_, p. 114. _Salmonella morbificans_, p. 115. _Salmonella schottmuelleri_, p. 115. _Salmonella_ sp. (Type Bareilly), p. 115. _Salmonella_ sp. (Type Bredeny), p. 115. _Salmonella_ sp. (Type Kentucky), p. 115. _Salmonella_ sp. (Type Meleagris), p. 116. _Salmonella_ sp. (Type Newport), p. 116. _Salmonella_ sp. (Type Oranienburg), p. 116. _Salmonella_ sp. (Type Panama), p. 116. _Salmonella_ sp. (Type Rubislaw), p. 116. _Salmonella_ sp. (Type Tennessee), p. 116. _Sarcina_ sp., p. 108. _Serratia marcescens_, p. 118. _Shigella alkalescens_, p. 118. _Spirillum periplaneticum_, p. 105. _Streptococcus faecalis_, p. 109. _Streptomyces leidynematis_, pp. 196, 197. _Tetragenous_ sp., p. 127. _Veillonella parvula_, p. 109. Fungi: _Aspergillus flavus_, p. 130. _Aspergillus niger_, p. 130. _Aspergillus_ sp., p. 131. _Cephalosporium_ sp., p. 131. _Herpomyces chaetophilus_, p. 135. _Herpomyces periplanetae_, p. 137. _Metarrhizium anisopliae_, p. 131. _Mucor guilliermondii_, p. 132. _Mucor_ sp., p. 132. _Penicillium_ sp., p. 131. _Rhizopus_ sp., p. 133. _Syncephalastrum_ sp., p. 133. _Torula acidophila_, p. 132. Protozoa: _Balantidium blattarum_, p. 187. _Balantidium ovatum_, p. 187. _Balantidium_ sp., p. 187. _Bodo_ sp. (host may have been _B. germanica_), p. 167. _Coelosporidium periplanetae_, p. 185. _Diplocystis schneideri_, p. 181. _Diplocystis_ sp., p. 181. _Dobellina_ sp. (host may have been _B. germanica_), p. 177. _Endamoeba blattae_, p. 177. _Endolimax blattae_, p. 180. _Endolimax_ sp. (host may have been _B. germanica_), p. 180.