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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:292 bookleafnumber292 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana drawing sketch monochrome photo border text 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:292 bookleafnumber292 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana drawing sketch monochrome 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:292 bookleafnumber292 bookcollection:medicalheritagelibrary bookcollectionmedicalheritagelibrary bookcollection:columbiauniversitylibraries bookcollectioncolumbiauniversitylibraries bookcollection:americana bookcollectionamericana drawing sketch monochrome photo border 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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: Fig. 35.—The Little House Fly {Homalomyiacanicularis 6). (Hewitt.) FLIES 253 bacteria on flies are comparatively small, while later the numbers arevery large. The places where flies live also determine largely the num-ber of bacteria they carry. The average of the 415 flies was about oneand one-quarter million bacteria. The method of the experiment wasto introduce the flies into a sterile bottle and pour into the bottle aknown quantity of sterilized water, then shake the bottle to wash thebacteria from the body of the fly. The numbers, therefore, only repre-sent those carried on the outside and not those in the intestinal tract.The experiments of Esten and Mason were designed to simulate thenumber of microorganisms that would come from a fly in falling intomilk. Torrey ^ found that a single fly may carry from 570 to 4,400,000bacteria upon its surface, and from 16,000 to 28,000,000 in its intes-tinal tract. The prevailing types are Streptococcus equinus jecalis and Text Appearing After Image: Fig. 36.—Wing of House Fly, Showing How It Carries Dust Particles. salivarius, which are also found in the breeding and feeding places ofthe house fly. Torrey also obtained three cultures of B. paratyphosuswhich is especially signiflcant. Even though flies breed in manure, and the larvae teem with bacteria,the adult winged insect, when newly hatched, contains fewer micro-organisms. This cleansing is due to the active phagocytosis which takesplace during metamorphosis from pupa to imago. The bacteria in theintestinal tract of the newly hatched imago are mostly extruded soon afteremergence from the puparium. Bacot,^ however, has shown that certain species of bacilli ingestedduring the larval period of Musca domestica can retain their existencewhile their host is undergoing the process of metamorphosis, and continuetheir existence in the gut of the adult fly, but that their number dimin-ishes suddenly after emergence. In a subsequent work Bacot ^ demon-strated that Bacillus pyocyaneus 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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