TABLE. Prevalence of microcephaly according to the type of larvicide used by municipalities of Recife metropolitan region, Pernambuco, Brazil.

Municipalities / larvicide	Cases	Newborns	Prevalence per 10,000
Bacillus thuringiensis israelensis
Recife	124	15,451	80.3
Jaboatão	56	6,474	86.5
Paulista	22	2,756	79.8
Sub-total	202	24,681	81.8
Pyriproxyfen
Olinda	18	4,013	44.9
Cabo de Sto. Agostinho	13	2,279	57.0
Camaragibe	14	1,572	89.1
S Lourenço da Mata	13	1,133	114.8
Igarassu	7	1,090	64.2
Ipojuca	14	1,066	131.3
Abreu e Lima	4	1,021	39.2
Moreno	5	543	92.0
Itapissuma	2	240	83.3
Araçoiaba	1	237	42.1
Ilha de Itamaracá	2	217	92.0
Sub-total	93	13,412	69.3
Total	295	38,093	77.4

x² = 1.61; df = 1; p = 0.21