A trypanosome of Atlantic cod, Gadus morhua L., transmitted by the marine leech Calliobdella nodulifera (Malm, 1863) (Piscicolidae)

Karlsbakk, Egil

doi:10.1007/s00436-004-1119-3

Cited by 21 publications

(22 citation statements)

References 5 publications

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“…Obviously, there is a need for a redescription of most the "old" nominal trypanosome species based on character variation and molecular data. The lack of knowledge on leech taxonomy and ecology probably also causes these problems, as fish trypanosomes maybe specific to their leech host (Karlsbakk 2004;Karlsbakk and Nylund 2006;Khaibulaev 1970). So far, no leeches have been found on Chinese fishes with trypanosomes, excepting that of Batracobdella paludosa Carena, which was identified as a vector of T. lichuanensis (Li and Wang 1996).…”

Section: Discussionmentioning

confidence: 99%

Morphological and genetic differences of Trypanosoma in some Chinese freshwater fishes: difficulties of species identification

Wang

et al. 2007

Parasitol Res

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Section: Discussionmentioning

confidence: 99%

Morphological and genetic differences of Trypanosoma in some Chinese freshwater fishes: difficulties of species identification

Wang

et al. 2007

Parasitol Res

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“…Trypanosomes are kinetoplastid protozoa that cause blood infection in many species of fish worldwide, including both freshwater species (FIGUEROA et al, 1999;SMIT et al, 2004;GU et al, 2007;KONAS et al, 2010) and marine species (SAUNDERS, 1959;OVERATH et al, 1999;KARLSBAKK, 2004;BURRESON, 2007). Transmission of these hemoflagellates between fish has been attributed to different species of leeches.…”

Section: Introductionmentioning

confidence: 99%

First record of Trypanosoma sp. (Protozoa: Kinetoplastida) in tuvira (Gymnotus aff. inaequilabiatus) in the Pantanal wetland, Mato Grosso do Sul State, Brazil

Pádua

Ishikawa

Satake

et al. 2011

Rev. Bras. Parasitol. Vet.

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The blood infection by Trypanosoma sp. in tuvira (Gymnotus aff. inaequilabiatus) from the Pantanal wetland was reported in this study. Ten fish from the Paraguay River in the Pantanal were evaluated for the presence of hemoflagellates. Trypomastigotes of Trypanosoma sp. were observed in blood smears from three fish (30% prevalence) and some forms were seen to be undergoing division. Using the diagnostic methods of fresh examination and blood centrifugation in hematocrit capillary tubes, the prevalence rate was 80%. This is the first report of Trypanosoma sp. in tuvira in Brazil.Keywords: Hemoflagellate, hemoprotozoa, live bait. ResumoO objetivo do presente estudo foi reportar a infecção por Trypanosoma sp. em tuviras (Gymnotus aff. inaequilabiatus) oriundas do Pantanal Sul-mato-grossense, Brasil. Dez peixes provenientes do rio Paraguai, Pantanal Sul-mato-grossense, foram avaliados quanto à presença de hemoflagelados. Tripomastigotas de Trypanosoma sp. foram observados nas extensões sanguíneas de três peixes (30% de prevalência), e algumas formas encontravam-se em divisão. Por meio do exame a fresco e da centrifugação do sangue em capilar de hematócrito como métodos para diagnóstico, a taxa de prevalência foi de 80%. Esse é o primeiro relato de Trypanosoma sp. em tuviras no Brasil.Palavras-chave: Hemoflagelado, hemoprotozoário, isca viva.

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“…Another fish leech, Calliobdella nodulifera (Malm, 1863) was implied as the likely vector in these areas (Fänge 1979, Mork 1988. Recently Karlsbakk (2004) showed that C. nodulifera act as vector of trypanosomes infecting cod in Western Norway, and concluded that these trypanosomes differed morphologically from T. murmanensis sensu Khan (1972Khan ( , 1976 transmitted by J. arctica in the NW Atlantic. Since both J. arctica and C. nodulifera occur along the Barents Sea coasts of the Kola Peninsula (cf.…”

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confidence: 99%

Morphology and aspects of growth of a trypanosome transmitted by the marine leech Johanssonia arctica (Piscicolidae) from Northern Norway

Karlsbakk

Haugen²,

Nylund³

2005

FOLIA PARASIT

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Abstract. The fish leech Johanssonia arctica (Johansson, 1898) was collected from king crabs Paralithodes camtschaticus (Tilesius, 1815) in Finnmark, N Norway, and allowed to feed on experimental fish hosts in the laboratory. This leech ingested blood from laboratory-reared cod (Gadus morhua) and halibut (Hippoglossus hippoglossus). Some experimental halibut acquired trypanosome infection, with parasitaemia between ca. 500 and 60,000 trypanosomes ml -1 . The trypanosomes were of variable size and measured 39-90 µm (mean 57 µm) ca. 81 days post-infection. Characteristic features are cell striation, refractile cytoplasmic granules, anterior nucleus and a relatively long (ca. 6 µm, max 9 µm) distance from the posterior end to the kinetoplast. Following growth, the trypanosomes became increasingly slender, with fewer striae and a nucleus position less pronounced anterior. The trypanosome is considered distinct from a type transmitted by the leech Calliobdella nodulifera (Malm, 1863) in the NE Atlantic, but is regarded conspecific with a trypanosome transmitted by J. arctica in the NW Atlantic. This trypanosome has in the past been identified as Trypanosoma murmanensis Nikitin, 1927, a poorly described species. T. murmanensis cannot be recognized with certainty among the trypanosomes transmitted by C. nodulifera and J. arctica respectively. We propose that the J. arctica-transmitted species is considered T. murmanensis Nikitin, 1927 sensu stricto.

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A trypanosome of Atlantic cod, Gadus morhua L., transmitted by the marine leech Calliobdella nodulifera (Malm, 1863) (Piscicolidae)

Cited by 21 publications

References 5 publications

Morphological and genetic differences of Trypanosoma in some Chinese freshwater fishes: difficulties of species identification

Morphological and genetic differences of Trypanosoma in some Chinese freshwater fishes: difficulties of species identification

First record of Trypanosoma sp. (Protozoa: Kinetoplastida) in tuvira (Gymnotus aff. inaequilabiatus) in the Pantanal wetland, Mato Grosso do Sul State, Brazil

Morphology and aspects of growth of a trypanosome transmitted by the marine leech Johanssonia arctica (Piscicolidae) from Northern Norway

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