Coliform bacterial species in RTE chicken products Antibiotic resistance patterns Coliforms were isolated from 15 (25%) of RTE products, and three genera of coliforms were identified, viz: Stenotrophomonas (n = 1), Serratia (n = 11) and Klebsiella (n = 3) (Table 2). The percentages of resistant coliform isolates to individual antibiotics are shown in Fig. 1. All isolates were resistant to ampicillin, with the exception of E. sakazakii, K. ozonae, and one strain of E. coli. Similarly, resistance to erythromycin was found in all isolates, except one strain of E. cloacae. TABLE 1. Incidence of coliform bacterial species in raw broiler products Coliform species No. of positive samples Percentage positive samples (%) Enterobacter cloacae 24 26.7 Enterobacter sakazakii 4 4.4 Enterobacter aerogenes 4 4.4 Enterobacter amnigenus 2 2 2.2 Serratia liquefaciens 14 15.6 Klebsiella pneumoniae 11 12.2 Klebsiella ornitholytica 2 2.2 Hafnia alvei 9 10 Citrobacter freundii 4 4.4 Citrobacter braakii 2 2.2 Escherichia coli 11 12.2 Yersinia pseudotuberculosis 1 1.1 Proteus mirabilis 2 2.2 Total 90 100 TABLE 2. Incidence of coliform bacterial species in RTE poultry products No. of positive samples Percentage positive samples (%) Serratia liquefaciens 11 73.3 Klebsiella pneumoniae 1 6.7 Klebsiella ozonae 2 13.3 Stenotrophomonas maltophilia 1 6.7 Total 15 100 foodprotection.org Coliform species Food Protection Trends 51http://www.foodprotection.org