Entomology With Special Reference to Its Ecological Aspects
Entomology With Special Reference to Its Ecological Aspects
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- The physical cause of the fever is conveyed in the feces of the lice and inoculation occurs through scratching by the victim, and possibly also by means of punctures made by the lice. The specific cause of trench fever is, however, not actually known as yet.
OTHER DISEASES Cholera is undoubtedly transmitted by flies. As long ago as 1899 Dr. Nuttall wrote: "The body of evidence as to the role of flies in the diffusion of cholera is, I believe, absolutely convincing. " Dysentery is probably car...ried by flies, as Dr. Orton. And others have inferred from their experiments.
Spillman and Haushalter, as well as several others, examined flies that had fed on tubercular sputum and found in the intestinal contents and in the dejections of these flies the bacilli of tuberculosis.
Dr. F. T. Lord summarizes his important investigations on this subject as follows: " i. Flies may ingest tubercular sputum and excrete tubercle bacilli, the virulence of which may last for at least fifteen days.
11 2. The danger of human infection from the tubercular fly-specks is by the ingestion of the specks on food.
What to read after Entomology With Special Reference to Its Ecological Aspects?
You can find similar books in the "Read Also" column, or choose other free books by Justus Watson Folsom to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
- The physical cause of the fever is conveyed in the feces of the lice and inoculation occurs through scratching by the victim, and possibly also by means of punctures made by the lice. The specific cause of trench fever is, however, not actually known as yet.
OTHER DISEASES Cholera is undoubtedly transmitted by flies. As long ago as 1899 Dr. Nuttall wrote: "The body of evidence as to the role of flies in the diffusion of cholera is, I believe, absolutely convincing. " Dysentery is probably car...ried by flies, as Dr. Orton. And others have inferred from their experiments.
Spillman and Haushalter, as well as several others, examined flies that had fed on tubercular sputum and found in the intestinal contents and in the dejections of these flies the bacilli of tuberculosis.
Dr. F. T. Lord summarizes his important investigations on this subject as follows: " i. Flies may ingest tubercular sputum and excrete tubercle bacilli, the virulence of which may last for at least fifteen days.
11 2. The danger of human infection from the tubercular fly-specks is by the ingestion of the specks on food.
What to read after Entomology With Special Reference to Its Ecological Aspects?
You can find similar books in the "Read Also" column, or choose other free books by Justus Watson Folsom to read onlineMoreLess
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