JANSEN, B. C., 1971. The quantitative determination of the toxic factors produced by Clostridium botulinum types C and D. Onderstepoort f. vet. Res., 38 (3), 177180 (1971). The Lf values of the C, C2 and D factors produced by Clostridium botulinum types C and D were compared with the results of in vivo quantitative tests. It was found that the flocculation test is a rel iable method of determin...

For over 10 years the Ide test has been in use in Nigeria as a simple slide flocculation test for syphilis and yaws in hospitals and clinics, and in the field, where the Kahn and Wassermann tests are impracticable. It was thought desirable that the results obtained by the Ide test should be compared with those obtained by the newly introduced Harris (VDRL) slide flocculation test, and an estima...

So many flocculation tests have been developed during the last few years that the time appears ripe to attempt a critical review of the mechanism and usefulness of some of the more popular procedures. Although many of these tests were developed primarily in relation to liver disease, where they are of proved value, it is generally recognized that they are not all specific in this respect. There...

A comparison is made of tests for thyroglobulin antibody, using gel diffusion, electroprecipitin, bentonite flocculation, tanned red cell agglutination, and latex slide agglutination techniques on sera from cases of Hashimoto's disease and other thyroid disorders. Any increase in gamma globulin was also noted from the serum electrophoretic pattern. The gel diffusion and electroprecipitin tests ...

The effects of polyacrylamide (PAM) molecular weights (MWs) on the PAM adsorption capacities and PAM-mediated flocculation of kaolinite suspensions were investigated using a series of nonionic PAMs with different MWs. Adsorption tests using aqueous kaolinite suspensions dosed with a series of PAMs with MWs of 1.5 kg/mol, 10 kg/mol, 0.6–1 Mg/mol, 5–6 Mg/mol, and 18 Mg/mol (referred to as 1.5 K, ...

A new serological technique of diagnosing human hydatid disease, employing polystyrene latex particles coated with hydatid cyst fluid, and a modified technique using bentonite particles are described. Comparison of the latex test with the complement-fixation test performed on 102 sera has shown a total agreement of 98% and an agreement of 93.1% in the positive specimens. The bentonite test and ...

Since the publication of the original complementfixation test for syphilis by Wassermann, Neisser, Bruck, and Schucht (1906) and the publication of the flocculation test of Porges and Meier (1908), innumerable modifications have been described for the improvement of both diagnostic methods. The technical complexity of the former furnished an incentive for the development of the latter. Yet, des...

The Lf-unit, which is used in the control of diphtheria and tetanus toxoid production and in some countries also to follow immunization of horses for production of antitoxins, has hitherto been defined by means of antitoxin preparations. A diphtheria toxoid and a tetanus toxoid preparation, both freeze-dried, were examined in an international collaborative study for their suitability to serve a...