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| Keywords: bookid:preventivemedici1917rose bookidpreventivemedici1917rose bookyear:1917 bookyear1917 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:rosenau__m__j___milton_joseph___1869_1946 bookauthorrosenaumjmiltonjoseph18691946 bookauthor:whipple__george_chandler__1866_1924 bookauthorwhipplegeorgechandler18661924 bookauthor:trask__john_w___john_william___b__1877 bookauthortraskjohnwjohnwilliamb1877 bookauthor:salmon__thomas_william bookauthorsalmonthomaswilliam booksubject:hygiene booksubjecthygiene booksubject:public_health booksubjectpublichealth booksubject:sanitation booksubjectsanitation booksubject:military_hygiene booksubjectmilitaryhygiene bookpublisher:new_york__london__d__appleton bookpublishernewyorklondondappleton bookcontributor:columbia_university_libraries bookcontributorcolumbiauniversitylibraries booksponsor:open_knowledge_commons booksponsoropenknowledgecommons bookleafnumber:290 bookleafnumber290 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana monochrome drawing photo border bookid:preventivemedici1917rose bookidpreventivemedici1917rose bookyear:1917 bookyear1917 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:rosenau__m__j___milton_joseph___1869_1946 bookauthorrosenaumjmiltonjoseph18691946 bookauthor:whipple__george_chandler__1866_1924 bookauthorwhipplegeorgechandler18661924 bookauthor:trask__john_w___john_william___b__1877 bookauthortraskjohnwjohnwilliamb1877 bookauthor:salmon__thomas_william bookauthorsalmonthomaswilliam booksubject:hygiene booksubjecthygiene booksubject:public_health booksubjectpublichealth booksubject:sanitation booksubjectsanitation booksubject:military_hygiene booksubjectmilitaryhygiene bookpublisher:new_york__london__d__appleton bookpublishernewyorklondondappleton bookcontributor:columbia_university_libraries bookcontributorcolumbiauniversitylibraries booksponsor:open_knowledge_commons booksponsoropenknowledgecommons bookleafnumber:290 bookleafnumber290 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana monochrome drawing bookid:preventivemedici1917rose bookidpreventivemedici1917rose bookyear:1917 bookyear1917 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:rosenau__m__j___milton_joseph___1869_1946 bookauthorrosenaumjmiltonjoseph18691946 bookauthor:whipple__george_chandler__1866_1924 bookauthorwhipplegeorgechandler18661924 bookauthor:trask__john_w___john_william___b__1877 bookauthortraskjohnwjohnwilliamb1877 bookauthor:salmon__thomas_william bookauthorsalmonthomaswilliam booksubject:hygiene booksubjecthygiene booksubject:public_health booksubjectpublichealth booksubject:sanitation booksubjectsanitation booksubject:military_hygiene booksubjectmilitaryhygiene bookpublisher:new_york__london__d__appleton bookpublishernewyorklondondappleton bookcontributor:columbia_university_libraries bookcontributorcolumbiauniversitylibraries booksponsor:open_knowledge_commons booksponsoropenknowledgecommons bookleafnumber:290 bookleafnumber290 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana monochrome drawing bookid:preventivemedici1917rose bookidpreventivemedici1917rose bookyear:1917 bookyear1917 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:rosenau__m__j___milton_joseph___1869_1946 bookauthorrosenaumjmiltonjoseph18691946 bookauthor:whipple__george_chandler__1866_1924 bookauthorwhipplegeorgechandler18661924 bookauthor:trask__john_w___john_william___b__1877 bookauthortraskjohnwjohnwilliamb1877 bookauthor:salmon__thomas_william bookauthorsalmonthomaswilliam booksubject:hygiene booksubjecthygiene booksubject:public_health booksubjectpublichealth booksubject:sanitation booksubjectsanitation booksubject:military_hygiene booksubjectmilitaryhygiene bookpublisher:new_york__london__d__appleton bookpublishernewyorklondondappleton bookcontributor:columbia_university_libraries bookcontributorcolumbiauniversitylibraries booksponsor:open_knowledge_commons booksponsoropenknowledgecommons bookleafnumber:290 bookleafnumber290 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana monochrome drawing Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: preventivemedici1917rose Title: Preventive medicine and hygiene Year: 1917 (1910s) Authors: Rosenau, M. J. (Milton Joseph), 1869-1946 Whipple, George Chandler, 1866-1924 Trask, John W. (John William), b. 1877 Salmon, Thomas William Subjects: Hygiene Public Health Sanitation Military Hygiene Publisher: New York, London, D. Appleton Contributing Library: Columbia University Libraries Digitizing Sponsor: Open Knowledge Commons View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: matter in the pits and then deposit it and feed upon the food prepared for the soldiers atthe mess tents. In some instances, where lime had recently been sprinkledover the contents of the pits, flies with their feet whitened with lime wereseen walking over the food. Vaughan subsequently stated that he con-sidered that about 15 per cent, of the cases of typhoid in the camps werecaused by fly transmission. Alice Hamilton ^ isolated typhoid bacilli from 5 out of 18 house flies captured in Chicago inthe privies and fence neara sick room. It has beenshown experimentallythat living typhoid bacillimay remain in or uponthe bodies of flies for aslong as 23 days after in-fection. Howard studied flyabundance in relation tothe origin and prevalence of typhoid fever in the District of Columbiain the summer of 1908.^ No particular correlation between the preva-lence of the flies and the prevalence of the disease could be made out.Flies undoubtedly spread the infection of typhoid fever, but the im- Text Appearing After Image: FiG. 34.—^WiNG OF Stable Fly (Stomoxys calcitrans). ^Jour. A. M. A.. 1903. 40, p. .576.^ Rosenan, Liimsdeii. and Kastle:Hygienic Laboratory Bull. No. 52. Report No. 3, 1908, P. H. and M. H. S., 253 INSECT-BORNE DISEASES portance of the role they play in this regard varies considerably withcircumstances. In camps, unsewered towns, and overcrowded places inpoor sanitary condition the danger from flies may be considerable, buteven under the worst conditions it is doubtful whether flies ever playthe major role or are responsible for the bulk of typhoid fever, as hasbeen stated. In a well-sewered city, such as Washington, we concludedthat the flies are probably responsible but for an occasional case of thedisease. It is very difficult in any particular instance to know quantita-tively just how much of the infection is conveyed by flies and how muchby contacts. The danger of flies is great enough without the need ofexaggeration, and their suppression fully justifies the best energies ofth Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. | ||||
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