Table 1 Number of freshwater habitats surveyed and the percentage of those that had niclosamide (Bayluscide®) application in official schistosomiasis control programs in Northeastern Brazilian states (Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, and Sergipe) in 1976–2002

1976

16 488

11.4

1977

43 178

3.4

1978

106 319

19.2

1979

54 817

32.4

1980

126 272

26.6

1981

123 070

23.5

1982

139 255

19.6

1983

178 178

21.0

1984

197 337

14.0

1985

212 113

14.4

1986

156 183

11.0

1987

55 339

11.1

1988

79 287

6.8

1989

100 720

7.1

1990

37 400

11.4

1991

51 012

8.5

1992

50 507

14.8

1993

45 572

15.7

1994

31 772

14.8

1995

34 181

13.7

1996

31 183

8.3

1997

27 832

14.4

1998

44 28

34.8

1999

7 774

9.4

2000

1 519

19.8

2001

3 306

0.3

2002

2 871

0