[The results of a comparative study of different series of commercial casein-carbon agar]. / Rezul'taty sravnitel'nogo izucheniia razlichnykh serii kommercheskogo kazeinovo-uglo'nogo agara.

Comparative assessment of the diagnostic properties of 30 lots of commercial casein-carbon agar used in practical bacteriology for the diagnosis of pertussis has shown essential differences in the efficacies of various lots of this medium. Only 11 of the 30 tested lots provided the formation of B. pertussis colonies in the periods established by the instruction. Addition of antibiotics to the medium reduced its diagnostic characteristics still more.

[Evaluation of the efficiency of a new dried nutrient medium for isolating Corynebacterium diphtheriae]. / Otsenka éffektivnosti novoi sukhoi pitatel'noi sredy dlia vydelenii Corynebacterium diphtheriae.

Tellurite blood media prepared on a new dried base with amino peptide have been found to have advantages, when used for the bacteriological diagnosis of C. diphtheriae infection, over Buchin's selective quinosol medium with respect to the rate and time of the isolation of C. diphtheriae; besides, these new media have been found to possess pronounced differentiating properties with respect to the concomitant microflora.

[A comparative study of nutrient media for isolating Corynebacterium diphtheriae]. / Sravnitel'noe izuchenie pitatel'nykh sred dlia vydeleniia korinebakterii difterii.

The diagnostic characteristics of 8 nutrient media most frequently employed at practical bacteriologic laboratories for the isolation of C. diphtheriae have been under study. Clauberg-2 medium and blood-tellurite agar have been found the most suitable for the diagnostic studies. Addition of extra ingredients to the standard recipe deteriorates the diagnostic potentialities of the media. Tinsdal's medium is characterized by the lowest diagnostic efficacy. The schemes of using these media are presented, with due consideration for their diagnostic potentialities.