The engineering subjects in the four-year college program of electrical engineering

Lovell, Alfred H.

doi:10.1109/ee.1932.6429834

Cited by 2 publications

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“…Specific Antigens. In preliminary tests it was found that, as Lovell (1932) stated, the specific phase of S. anatum closely resembled the specific phases of the Reading and Newport types. Tests to determine definitely the specific factors of strains C1 S. anatum MC2 specific...... 32000 4000 8000 100 100 0 100 0 0 S. newport 1857 specific...... 32000 4000 8000 0 0 0 100 0 0 S. reading 316 specific ....... 32000 4000 8000 0 100 0 0 0.…”

Section: Resultsmentioning

confidence: 63%

“…The methods used in the preparation of antigens for agglutination and absorption tests were largely those recommended by White (1926) and Lovell (1932). In testing for the presence of flocculating agglutinins, formalinized broth cultures were used, since it was found that they were much more sensitive to the action of flocculating agglutinins than most suspensions of agargrown organisms.…”

Section: Coopermentioning

confidence: 99%

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The Antigens of Salmonella anatum

Edwards

1935

J Bacteriol

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Rettger and Scoville (1920) isolated a number of cultures of paratyphoid bacilli from a fatal disease of young ducklings. These organisms were described and characterized as Bacterium anatum, N.S. Further study of these cultures by Edwards and Rettger (1927) revealed that they constituted two distinct types, one identical with Salmonella aertrycke, the other an apparently independent type of paratyphoid bacillus unlike any of the cultures with which it was compared. The name, Salmonella anatum, was retained for the latter type. Edwards (1929) isolated S. aratum from an outbreak of paratyphoid infection in young chicks. Again the organism was found to be associated with S. aertrycke. Gaiger and Davies (1930) isolated an organism which they referred to as S. anatum, from young chicks. According to Lovell (1932) the organism isolated by Gaiger and Davies was not S. anatum, but Salmonella enteritidis. While S. anatum had gained recognition as a distinct type of Salmonella, no detailed report of its antigenic relationships was published until Lovell (1932) tentatively assigned it an antigenic formula based on the scheme of White (1926). Lovell stated that S. anatum possessed the stable antigen of the S. enteritidis group or of the London type of Salmonella. This conflict of evidence probably arose through certain English workers mistaking S. enteritidis for S. anatum. Lovell represented the specific phase of S. anatum as similar to the specific phases of the

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Section: Resultsmentioning

confidence: 63%

Section: Coopermentioning

confidence: 99%

The Antigens of Salmonella anatum

Edwards

1935

J Bacteriol

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“…Sera prepared against S. amersfoort were also used. The sera were prepared according to the method described by Henning (1936) and the agglutinating suspensions by Lovell's (1932) technique. For absorption tests the germ was grown on Mason tubes (Mason, 1933), the growth from one tube being more than sufficient for the complete absorption of about 3 c.c.…”

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confidence: 99%

On the variation of the specific phase of Salmonella amersfoort (n.sp.)

Henning

1937

Epidemiol. Infect.

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A new type of pathogenic Salmonella for the fowl has been described. Its somatic “O” antigen corresponds with factors VI, VII of potsdam. It occurs only in the specific phase, but its flagellar “H” antigen contains at least two distinct and separate antigenic complexes, which commonly occur in organisms that are not even remotely related. The one complex (the first, en-, antigen, α phase of Kauffmann and Mitsui) contains factors enx, which represent also the factors of the specific phase of abortus-equi. The other complex (the second, d-, antigen, β phase of Kauffmann and Mitsui) contains factor d, which comprises the type phase of stanley, muenchen and typhi.Single cells containing factors enx on multiplying constantly yield variants containing factor d as well as offspring that retain antigenic complex enx. In the same way single cells containing apparently only specific factor d will bring forth new cells, most of which retain the parental antigenic structure, but a small proportion of the progeny will acquire specific factors enx instead of d.When a broth culture of amersfoort in either the enx or d phase in an apparently pure form, as judged by the agglutination test, using heterologous sera which contain agglutinins either against factors enx (or en) or d, is used for the preparation of sera, agglutinins of approximately the same titre for both variants are produced in the sera.As a result of the information given above the following antigenic structure is proposed for Salmonella amersfoort:Somatic “O” antigen—VI, VII.Flagellar “H” antigen—(1) α phase of Kauffmann and Mitsui—enx.(2) β phase of Kauffmann and Mitsui—d.

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The engineering subjects in the four-year college program of electrical engineering

Cited by 2 publications

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The Antigens of Salmonella anatum

The Antigens of Salmonella anatum

On the variation of the specific phase of Salmonella amersfoort (n.sp.)

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