TY  - JOUR 
T1  - Extended-spectrum beta-lactamase production among ampicillin-resistant Escherichia coli strains from chicken in Enugu State, Nigeria
JO  - Brazilian Journal of Microbiology
A1  - Chah, K.F.
A1  - Oboegbulem, S.I.
SN  - 1517-8382
UL  - 10.1590/S1517-83822007000400018
VL  - 38 
Y1  - 2007
PB  - Brasil 
ER  -