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Volume 4 No. 3 / July-September 1998 (1625 bytes)



Synopses

Bacterial Symbiosis in Arthropods and the Control of Disease Transmission

Charles B. Beard,* Ravi V. Durvasula,† and Frank F. Richards†
*Centers for Disease Control and Prevention, Atlanta, Georgia, USA; and †Yale University School of Medicine, New Haven, Connecticut, USA


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Figure 1. A triatomine bug vector of Chagas disease in the process of feeding. The fecal droplet contains infective trypanosomes and bacterial symbionts. (Photographs courtesy of Robert B. Tesh).


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Figure 2. Shuttle plasmid for genetic transformation of Rhodococcus rhodnii.


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Figure 3. Symbionts can be genetically altered and used to replace native symbionts, resulting in insects that can no longer transmit disease. (Illustration courtesy of Mark Q. Benedict).


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Figure 4. The tsetse secondary symbiont GP01 growing intracellularly and extracellularly in culture.


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Figure 5. Wolbachia-like organisms in insect reproductive tissues


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Figure 6. Wolbachia-mediated cytoplasmic incompatibility.

 

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