{"id":1522,"date":"2019-02-18T17:10:38","date_gmt":"2019-02-18T20:10:38","guid":{"rendered":"http:\/\/fishhistopathology.com\/home\/?p=1522"},"modified":"2020-02-14T14:45:56","modified_gmt":"2020-02-14T17:45:56","slug":"caligus-rogercresseyi-gross-pathology","status":"publish","type":"post","link":"https:\/\/fishhistopathology.com\/?p=1522","title":{"rendered":"Caligus Rogercresseyi \u2013 Gross Pathology"},"content":{"rendered":"\n

Caligus rogercresseyi <\/em>is a predominant parasitic problem in the salmonid industry in Chile. It mainly affects Atlantic salmon and Rainbow trout. Coho salmon is not considered susceptible due to a well-developed inflammatory response. <\/p>\n\n\n\n

\"Atlantic<\/a>
Figure 1. Atlantic salmon with a severe infestation by Caligus rogercresseyi<\/i> (Picture courtesy of Jaime Santana – VM).<\/strong><\/figcaption><\/figure><\/div>\n\n\n\n


The life cycle of C. rogercresseyi<\/em> is composed of eight stages of development, two\nnauplius stages I and II, an infested copepodite stage, four chalimus stages\nand an adult stage (young adult and mature adult).<\/p>\n\n\n\n


The amount of time it takes for a louse to develop depends greatly on the temperature. Under laboratory conditions the C. rogercresseyi<\/em> life cycle is completed in 45 days when the water temperature is 10\u00b0C, 32 days at 12\u00b0C and 26 days at 15\u00b0C.<\/p>\n\n\n\n

\"Atlantic<\/a>
Figure 2. Atlantic salmon with adult females (C. rogercresseyi<\/i>). Note the lesions on the skin surface. Note also the paired trailing egg sacs (Picture courtesy of Marcelo Vera – VM). <\/strong><\/figcaption><\/figure><\/div>\n\n\n\n





The external gross findings include loss of body condition, haemorrhages, petechiae and abrasions on the surface of the body causing immunosuppression in the host.<\/p>\n\n\n\n

\"Life<\/a>
Figure 3. Life cycle of Caligus rogercresseyi <\/i> (Picture courtesy of Jaime Santana – VM).<\/i><\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

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REFERENCES<\/strong><\/p>\n\n\n\n

  • Gonz\u00e1lez, L., & Carvajal, J. (2003). Life cycle of Caligus rogercresseyi,<\/em>(Copepoda: Caligidae) parasite of Chilean reared salmonids. Aquaculture, 220(1-4), 101-117.<\/li><\/ul>\n\n\n\n
    • Revie, C. W., Gettinby, G., Treasurer, J. W., Rae, G. H., & Clark, N. (2002). Temporal, environmental and management factors influencing the epidemiological patterns of sea lice (Lepeophtheirus salmonis<\/em>) infestations on farmed Atlantic salmon (Salmo salar<\/em>) in Scotland. Pest Management Science: formerly Pesticide Science<\/em>, 58<\/em>(6), 576-584. <\/li><\/ul>\n\n\n\n

      <\/p>\n","protected":false},"excerpt":{"rendered":"

      Caligus rogercresseyi is a predominant parasitic problem in the salmonid industry in Chile. It mainly affects Atlantic salmon and Rainbow trout. Coho salmon is not considered susceptible due to a well-developed inflammatory response. The life cycle of C. rogercresseyi is composed of eight stages of development, two nauplius stages I and II, an infested copepodite stage, four chalimus stages and an adult stage (young adult and mature adult). The amount of time it takes for a louse to develop depends greatly on the temperature. Under...","protected":false},"author":3,"featured_media":1525,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[59,60,62,63],"class_list":["post-1522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-skin","tag-caligus-rogercresseyi","tag-haemorrhages","tag-life-cycle","tag-parasite"],"_links":{"self":[{"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/posts\/1522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1522"}],"version-history":[{"count":6,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/posts\/1522\/revisions"}],"predecessor-version":[{"id":2292,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/posts\/1522\/revisions\/2292"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=\/wp\/v2\/media\/1525"}],"wp:attachment":[{"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fishhistopathology.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}