- M 124
In the table the association of Z and X is given a special place in view of its high incidence in the series, and also because of the comparative specificity of its antigenic structure, there being in most instances either complete absence of agglutination against the antisera of the other strains or else a fairly definite response on the part of Y—the latter being a very typical part of the pattern.
All
(b) Malaria.—A considerable increase of blood slides received for the diagnosis of malaria afforded us the opportunity of making a careful species determination of the parasites present. The pre-existing records of the Colony are incomplete in this respect; it was thought useful to attempt to fill the gap. Films were personally examined by the writer, occasionally with the assistance of the Malariologist, Dr. R. B. Jackson. While the figures are still not large, the results are of interest, disclosing as they do, the presence of Quartan infection to a not inconsiderable degree. This species was hitherto considered uncommon in Hong Kong. (see M 127.)
It was found necessary again to go into the question of staining methods. The method of Shute was tried, and, in a modified form, has been so successful that it is being used routinely. The difference between the original method and the modification consists in omitting the determination of the pH of the methyl alcohol. In its present form, it is simple and fitted to the needs of a busy diagnostic laboratory.
(c) Diphtheria.—Some work has been done and is still in progress on media for the isolation of the Klebs-Loeffler Bacillus, the idea being, if possible, to obtain a medium which will be as useful for diagnostic purposes as for purposes of virulence testing. To this end, a modification is being made of the original Loeffler slope by the addition of varying amounts of tellurite. While the work is not yet completed, a good measure of success has been obtained; the medium at present used being almost as sensitive as Loeffler's but succeeds in inhibiting nearly all other growth, so that a culture of considerable purity is obtained in most cases. Should the desired result be obtained, it would be possible to use the diagnostic culture for virulence testing without the intervening steps of plating and picking colonies. The saving of time and work which would result is, of course, obvious.
(d) Miscellaneous.—Collection of material for research is being carried out on behalf of Professor Hoeppli and Professor van Dyke of Peiping Union Medical College; in the case of the former, livers infested with Clonorchis, and the latter, pituitary glands are being collected and forwarded.
- M 124
In the table the association of Z and X is given a special place in view of its high incidence in the series, and also because of the comparative specificity of its antigenic structure, there being in most instances either complete absence of agglutination against the antisera of the other strains or else a fairly definite response on the part of Y-the latter being a very typical part of the pattern.
All
(b) Malaria.-A considerable increase of blood slides receiv- ed for the diagnosis of malaria afforded us the opportunity of making a careful species determination of the parasites present. The pre-existing records of the Colony are incomplete in this respect it was thought useful to attempt to fill the gap. films were personally examined by the writer, occasionally with the assistance of the Malariologist, Dr. R. B. Jackson. While the figures are still not large the results are of interest, disclos- ing as they do, the presence of Quartan infection to a not in considerable degree. This species was hitherto considered un- common in Hong Kong. (see M 127.)
It was found necessary again to go into the question of staining methods. The method of Shute was tried, and, in a modified form, has been so successful that it is being used routinely. The difference between the original method and the modification consists in ommitting the determination of the pH of the methyl alcohol. In its present form it is simple and fitted to the needs of a busy diagnostic laboratory.
(c) Diphtheria.-Some work has been done and is still in progress on media for the isolation of the Klebs-Loeffler Bacillus, the idea being, if possible, to obtain a medium which will be as useful for diagnostic purposes as for purposes of virulence testing. To this end a modification is being made of the original Loeffler slope by the addition of varying amounts of tellurite. While the work is not yet completed a good measure of success has been obtained, the medium at present used being almost as sensitive as Loeffler's but succeeds in inhibiting nearly all other growth, so that a culture of considerable purity is obtained in most cases. Should the desired result be obtained, it would be possible to use the diagnostic culture for virulence testing without the intervening steps of plating and picking colonies. The saving of time and work which would result, is of course obvious.
(d) Miscellaneous.-Collection of material for research is being carried out on behalf of Professor Hoeppli and Professor van Dyke of Peiping Union Medical College; in the case of the former, livers infested with clonorchis, and the latter, pituitary glands are being collected and forwarded,
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