Paternity Testing in Rhode Island

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Paternity Testing in Rhode Island

C. Young MD, J. Lawton MS, MT (ASCP), SBB, S. Lynch PBT (ASCP), R. Yankee MD
Rhode Island Blood Center

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INTRODUCTION

The Rhode Island Blood Center, an AABB accredited parentage testing laboratory, has been performing parentage testing since 1984. The number of parentage testing cases has increased over the years. In 1995 we performed parentage testing on 610 cases. This is data acquired from 1995.

METHODS

The tests routinely used include ABO, Rh, MNSs and HLA.

DNA loci/probes used included: D7S104/pS194, D17S34/p144-D6, D21S112/pL427-4, D11S129/pR365-1, D1S47/pL336.

Restriction enzyme used was Pst-1.

RESULTS

Racial groupings of mother and alleged father revealed the following:

25.42% racially mixed parents
74.58% same race parents
Of those parents in the same race:
Black: 79/610 = 12.95%
Hispanic: 27/610 = 4.43%
American Indian: 2/610 = 0.33%
Asian: 8/610 = 1.31%

Total Cases: 610

Exclusions: 175 (28.69%)

Inclusions: 435 (71.31%)

Average Probability of Paternity = 99.11%

Total Cases with DNA (RFLP) Testing = 70 (11.78%)

Of those 70 tested with DNA:

Exclusions: 15 (21.43%) Of the total exclusions, 15/175 (8.57%) were excluded with DNA. 91.43% were excluded using non-DNA testing.
Inclusions: 55 (78.57%) Of total inclusions, 55/435 (12.64%) were included with DNA.

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