Phenotypic and genetic characterization of Piscirickettsia salmonis from Chilean and Canadian salmonids

BMC Veterinary Research

Table 1 Data for all the selected P. salmonis isolates included in the study

Isolate code	Country	County (Region)	Sampling date	Mortality (%)	Host	Sample tissue	Clinical condition
LF-89	Chile	Puerto Montt (X)	1989	na	Coho salmon	kidney	na
Ch2-As-I	Chile	Chiloé Sur (X)	08.08.2012	7,8	Atlantic salmon	k-l-sp-b	acute
Ch3-Rt-L	Chile	Calbuco (X)	03.10.2012	6,7	Rainbow trout	lession	sub-acute
Ch4-Rt-L	Chile	Calbuco (X)	05.10.2012	6,7	Rainbow trout	lession	sub-acute
Ch5-As-I	Chile	Chiloé Centro (X)	18.07.2012	5,1	Atlantic salmon	k-l-b	sub-acute
Ch6-Rt-L	Chile	Calbuco (X)	10.08.2012	13,2	Rainbow trout	lession	sub-acute
Ch7-As-L	Chile	Aysén (XI)	na	na	Atlantic salmon	muscle	chronic
Ch8-Rt-K	Chile	Chiloé Centro (X)	17.06.2011	1,9	Rainbow trout	kidney	sub-acute
Ch9-As-na	Chile	Chiloé Centro (X)	27.03.2012	2,4	Atlantic salmon	na	sub-acute
Ch10-As-I	Chile	Chiloé Sur (X)	24.07.2012	21,5	Atlantic salmon	k-l-sp-b	acute
Ch11-As-I	Chile	Chiloé Centro (X)	04.05.2012	2,2	Atlantic salmon	k-l-b	sub-acute
Ch12-As-I	Chile	Chiloé Centro (X)	07.05.2012	14,8	Atlantic salmon	k-l-b	acute
Ch13-As-I	Chile	Chiloé Centro (X)	18.04.2012	3,6	Atlantic salmon	k-l-sp-b	chronic
Ch14-As-I	Chile	Chiloé Centro (X)	13.01.2012	14,8	Atlantic salmon	k-sp	acute
Ch15-As-I	Chile	Chiloé Centro (X)	23.08.2012	5,4	Atlantic salmon	k-l-b-sp	sub-acute
Ch16-As-I	Chile	Chiloé Centro (X)	June 2012	14,8	Atlantic salmon	k-l-b	acute
Ch17-As-I	Chile	Chiloé Centro (X)	23.05.2012	14,8	Atlantic salmon	k-l-b	acute
Ch18-As-I	Chile	Chiloé Centro (X)	22.06.2012	3,6	Atlantic salmon	k-l-b-sp	chronic
Ca19-As-I	Canada	British Columbia	11.12.2012	<0,03	Atlantic salmon	kidney	chronic
Ca20-As-I	Canada	British Columbia	11.12.2012	<0,03	Atlantic salmon	kidney	chronic

Codes indicates the country of isolation, Chile (Ch), Canada (Ca); number of isolate (1–20); fish species, Atlantic salmon (As), Rainbow trout (Rt), Coho salmon (Cs); and tissue, kidney (K), liver (l), spleen (sp) and brain (b). The samples were obtained from a pool of internal organs. The codes are: I from internal lesions, L from external lesions, and K from kidney. Sub-acute and acute clinical conditions frequently present hemorrhages in the brain, splenomegaly and extensive congestion particularly in the swimbladder. In chronic conditions typical findings are whitish nodules in the liver which becomes brownish and finally progress as granuloma. Mostly in Atlantic salmon and rainbow trout, the dermis present speckle erosions which progress to pustules and finally caverns. It has also seen splenomegaly and hepatomegaly; pericarditis with fibrin deposits in Atlantic salmon and rainbow trout. In Coho salmon the fibrin deposits are located mostly internally in the abdomen. Mortality percentage is described as percentage of dead fish due to SRS, from necropsy findings, in one production cycle. In most of the farms antimicrobials were used for treatment. Na: information not available

ISSN: 1746-6148