Isolation and characterization of form specific DNA sequences of O. volvulus

Erttmann, K.D.; Meredith, S.E.; Greene, B.M.; Unnasch, T.R.

Acta Leidensia 59(1-2): 253-260

1990


ISSN/ISBN: 0065-1362
PMID: 2378208
Document Number: 359383
The isolation and characterization of pSS-1, a clone which hybridized preferentially to the savannah form Onchocerca volvulus in Africa, is described. DNA sequence analysis demonstrated that pSS-1 was a representative of a highly repeated sequence family of O. volvulus. Comparison of the sequence of pSS-1 to other known examples of this family identified a region of pSS-1, designated pSS-1BT, which appeared to be specific for the savannah form of O. volvulus. Tests of isolates from different areas demonstrated that the specificity of pFS-1 and pSS-BT were not confined to a small geographic region. However, the close relationship of pFS-1 and pSS-BT to less specific members of the repeat family is thought to mean that their specificity and sensitivity are affected by small changes in the conditions under which they are used.

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