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Recombinant DNA probes for Mycoplasma synoviae
1Department of Epidemiology and Preventive Medicine, School of Veterinary Medicine, University of California, Davis 95616.
Avian Diseases
|July 1, 1990
Summary
Researchers developed a genomic library from Mycoplasma synoviae (MS) to identify specific DNA fragments. These fragments can differentiate MS from Mycoplasma gallisepticum (MG) in avian species.
Area of Science:
- Molecular biology
- Microbiology
- Genomics
Background:
- Mycoplasma synoviae (MS) and Mycoplasma gallisepticum (MG) are significant avian pathogens.
- Distinguishing between MS and MG is crucial for disease control and management in poultry.
Purpose of the Study:
- To construct a genomic library of Mycoplasma synoviae (MS) for identifying specific DNA sequences.
- To develop molecular probes for differentiating MS from MG and other avian mycoplasmas.
Main Methods:
- Preparation of a genomic library from MS strain WVU 1853 using plasmid vector pUC8 and Escherichia coli host JM83.
- Dot blot and Southern hybridization assays using 32P-labeled DNA probes derived from recombinant plasmids.
- Testing hybridization specificity against various MS and MG strains, including field isolates.
Main Results:
- Four E. coli clones containing MS DNA fragments were identified using dot blot assays.
- Southern hybridization confirmed the presence of two MS DNA fragments (1.0-2.3 kbp) in each recombinant plasmid.
- The developed probes specifically hybridized with MS strains (WVU 1853 and nine field isolates) but not with MG strains or 15 other avian mycoplasma species.
Conclusions:
- A specific genomic library for Mycoplasma synoviae was successfully constructed.
- The identified MS DNA fragments can serve as reliable molecular markers for differentiating MS from MG.
- This approach offers a valuable tool for accurate diagnosis and epidemiological studies of avian mycoplasmosis.