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CULTIVATION AND CLASSIFICATION OF "BACTEROIDES," "SYMBIONTS," OR "RICKETTSIAE" OF BLATTELLA GERMANICA.

¹Department of Animal Pathology of The Rockefeller Institute for Medical Research, Princeton, N. J.

The Journal of Experimental Medicine

|October 30, 2009

Summary

This summary is machine-generated.

German cockroaches harbor intracellular diphtheroid bacilli within bacteriocytes, transmitted maternally through ova. This study identifies and names these bacteria as Corynebacterium blattellae.

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Area of Science:

Microbiology
Entomology
Bacteriology

Background:

Bacteriocytes, specialized cells housing microorganisms, are present in both sexes of the German cockroach (Blattella germanica).
These bacteriocytes contain intracellular microorganisms within their cytoplasm, scattered throughout the fat tissue.

Purpose of the Study:

To identify and characterize the intracellular microorganisms found in the bacteriocytes of Blattella germanica.
To determine the mode of transmission of these microorganisms.
To propose a taxonomic classification for the identified bacterial species.

Main Methods:

Isolation and cultivation of intracellular parasites from adult bacteriocytes and embryos of Blattella germanica using a previously described technique.
Characterization of cultivated bacterial strains based on size, general morphology, and tinctorial reactions.
Comparison of cultivated strains with known Corynebacterium species.

Main Results:

Intracellular parasites were identified as diphtheroidal bacilli.
Two distinct diphtheroidal strains were cultivated with similar frequency, suggesting a single species with minor variations.
The cultivated bacteria's characteristics matched the intracellular parasites and could be differentiated from Corynebacterium periplanetae variety americana.

Conclusions:

The intracellular diphtheroids in German cockroaches are transmitted transovarially (through ova).
A new species, Corynebacterium blattellae nov. sp., is proposed for these identified bacteria.
This research clarifies the symbiotic relationship and bacterial identity within Blattella germanica.