Infection of barramundi Lates calcarifer with Streptococcus iniae: effects of different routes of exposure

Bromage, E.S., and Owens, L. (2002) Infection of barramundi Lates calcarifer with Streptococcus iniae: effects of different routes of exposure. Diseases of Aquatic Organisms, 52 (3). pp. 199-205.

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Abstract

The use of various challenge techniques has allowed the formation of a hypothesis for the mode of infection of Streptococcus iniae in barramundi. A bacterial dose of 1 x 10³ colony forming units (cfu), corresponding to the LD50, delivered orally to barramundi could initiate the sub-acute form of the disease observed at the farms. The acute form of the disease could be initiated through bath exposure to the pathogen. S. iniae was equally as infective in freshwater, saltwater or when fish were subject to skin trauma prior to exposure, with LD₅₀ values of 3.2 x 10⁴, 2.0 x 10⁴, 3.2 x 10⁴ cfu, respectively, when observed over a 10 d period. It is suggested that sub-acute infection occurs orally, with mass mortalities occurring through the increased presence of the bacterium in the environment.

Item ID: 29226
Item Type: Article (Research - C1)
ISSN: 1616-1580
Keywords: barramundi, Streptococcus iniae, route of infection
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This article is open access as per the publisher's 4 year embargo period.

Date Deposited: 03 Oct 2013 22:44
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070404 Fish Pests and Diseases @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830299 Fisheries- Wild Caught not elsewhere classified @ 50%
83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830199 Fisheries - Aquaculture not elsewhere classified @ 50%
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