Identifier: annualreport60mass (find matches)
Title: Annual report
Year: 1864 (1860s)
Authors: Massachusetts Agricultural College Massachusetts Agricultural Experiment Station Massachusetts Agricultural Experiment Station Annual report of the Hatch Experiment Station of the Massachusetts Agricultural College
Subjects: Agriculture
Publisher: Boston : (s.n.)
Contributing Library: UMass Amherst Libraries
Digitizing Sponsor: Boston Library Consortium Member Libraries

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y, only one culture of the 112 showing no change in the initial acidity. Maltose. — None of the 112 strains produced any acid. The change was usuallymarked in all tubes on the fifth day. There was an average reduction of acidity of—0.18 per cent. Glycerine. — None of the 112 strains produced any acid in glycerine. Thedetermination on the fifth day showed a reduction in the final acidity, averaging—0.1 per cent. Conclusions from the Fermentation Tests. From the tests reported concerning the fermentation of the 112 strainsof Bad. pullorum, it appears that this organism is positive in dextrose,galactose, mannose, mannite, levulose, xylose and arabinose; and negativein glycerine, maltose, adonite, dulcite, lactose, dextrine, saccharose, inulin,erythrol and raffinose. In salicin there is a slight indication of fermenta-tion, at least a slight acidity in a large percentage of the strains. All strainsof this organism studied showed a marked tendency to produce gas in ii °^* °»-jj;
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BACTERIUM PULLORUM INFECTION IN FOWL. 71 dextrose. This aerogenic property of the pullorum strains is persistent.Cultures of pullorum carried for fourteen months in France during thewar, and kept under adverse conditions, when planted again under favor-able conditions regained their aerogenic properties, and the activities inthis direction were as marked as in the original cultures. The 112 strainsof Bad. pullorum studied, even after being transferred eighteen times, stillretain active gas production in dextrose and mannite. In one exception,culture No. 44, there has never developed more than a bubble of gas inthe dextrose. This is recorded in the table in the dextrose column as B,meaning bubble. All strains are methyl red negative. Therefore fromprevious morphological and cultural tests, linked with these biochemicalfindings, it may be concluded that the organism classed to-day as Bact.pullorum A should be a slender, non-motile, non-liquefying, gram-negativebacillus. It does not coag

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