Diversity of Mercury Resistant Escherichia coli Strains Isolated from Aquatic Systems in Rio de Janeiro, Brazil

Table 1

Origin of Escherichia coli strains included in this study.

E. coli strains	Strains (𝑛)	Aquatic system∗	Sampling site	Sampling period
RM 1–RM 30; RM 33–RM 77	75	RWW	Canal do Mangue, Rio Jacaré, Canal do Cunha, Rio Faria, Rio Irajá, Canal do Meriti, Rio Sarapuí, Lagoa Rodrigo de Freitas, Lagoa da Tijuca, Lagoa de Marapendi, Rio São João	December/2009 to August/2010
RM 31-RM 32; RM 78–RM 84	09	IWW	Rio Saracuruna, Rio Imbariê, Rio Iguaçú	October/2010
RM 85–RM 110	26	AWW	Rio Vargem Grande, Córrego das Pedras	October/2010
RM 111–RM 149	29	HWW	Lagoa de Jacarepaguá	January/2011
RM 150–RM 154; RM 156–RM 179	39	RW	Parque Nacional da Praia de Ramos	January/2011

∗RWW: residential wastewater; IW: industrial wastewater; AWW: agricultural wastewater; HWW: hospital wastewater, and RW: recreational waters.