Fish host range of seven isolates of <i>Cryptocaryon irritans</i> (Ciliophora)

Burgess, Peter; Matthews, R. A.

doi:10.1111/j.1095-8649.1995.tb01109.x

Cited by 22 publications

(26 citation statements)

References 2 publications

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“…C. irritans has been responsible for fish mortalities in mariculture, however limited approaches are available for combating this parasite (Nigrelli & Ruggieri, 1966;Hu# & Burns, 1981;Colorni, 1985;Rasheed, 1989). The occurrence of a Cryptocaryon-like parasite from the Mediterranean (Diamant et al, 1991) is therefore further cause for concern in view of the southward extensions of the European mariculture industry and the fact that temperate species of teleost fish are also susceptible to C. irritans when maintained at temperatures above 20 C (Burgess & Matthews, 1994a;1995). More e#ective management of cryptocaryosis would result from an understanding of the host immune response to C. irritans, including the development of a vaccine.…”

Section: Introductionmentioning

confidence: 97%

Cryptocaryon irritans(Ciliophora): acquired protective immunity in the thick-lipped mullet,Chelon labrosus

Burgess

Matthews

1995

Fish & Shellfish Immunology

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Section: Introductionmentioning

confidence: 97%

Cryptocaryon irritans(Ciliophora): acquired protective immunity in the thick-lipped mullet,Chelon labrosus

Burgess

Matthews

1995

Fish & Shellfish Immunology

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“…Cryptocaryon irritans is a holotrichous marine ciliate protozoan that causes the white spot of marine teleosts in temperate and tropical seas (e.g., Burgess and Matthews 1995;Yambot et al 2003). Geographical distribution of the disease includes the Indo-pacific, the Persian Gulf, the Red Sea in Israel, the Atlantic Ocean, and particularly the Caribbean Sea (Colorni and Burgess 1997;Yambot et al 2003).…”

Section: Introductionmentioning

confidence: 98%

Characterization of Cryptocaryon irritans isolates from marine fishes in Mainland China by ITS ribosomal DNA sequences

et al. 2006

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Seven isolates of Cryptocaryon irritans from different host species and geographical locations in Mainland China were characterized by the first (ITS-1) and second (ITS-2) internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA) using two isolates of Ichthyophthirius multifiliis for comparative purposes. The rDNA region including the ITS-1, 5.8S, ITS-2, and flanking 18S and 28S sequences were amplified by polymerase chain reaction and the amplicons were sequenced directly. The ITS-1, 5.8S, and ITS-2 sequences were 129, 160, and 190 bp in length, respectively, for all seven C. irritans isolates, whereas the corresponding sequences for the two I. multifiliis isolates were 142, 153, and 194 bp, respectively. While sequence variation among the seven C. irritans isolates ranged from 0 to 1.6% in both the ITS-1 and ITS-2, and the two I. multifiliis isolates differed by 1.4% in the ITS-1 and 1.0% in the ITS-2; C. irritans differed from I. multifiliis by 57.1-60.9% in the ITS-1 and 79.4-83.0% in the ITS-2, indicating that ITS sequences provide reliable genetic markers for the identification and differentiation of the two species. Phylogenetic analysis using the sequence pairwise-distance data using the neighbor-joining method inferred that the seven C. irritans isolates from Mainland China and two other isolates (T.A and Aus.C) from other countries clustered together to show monophyly, which could be readily distinguished from the other monophyletic group all from other regions. Therefore, ITS sequence data and phylogenetic analysis provided strong support that C. irritans isolates from Mainland China represent a single species. The definition of genetic markers in the ITS rDNA provide opportunities for studying the ecology and population genetic structures of the C. irritans from Mainland China and elsewhere and is also relevant to the diagnosis and control of fish diseases they cause.

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“…Site 2 fish collected in 20 yr of s a m p h y . Recent iaboratory was Jumpinpin, a coastal bar area in eastern Moreton studies of C. irritans have obtained the parasite from Bay, whilst Site 3 was Heron Island (23"27'S, retailers importing various species of tropical marine 151°55'E), a coral cay in the southern Great Barrier fish (Burgess & Matthews 1994a, 1995 Reef approximately 700 km north of Moreton Bay. A Dickerson 1994).…”

Section: Methodsmentioning

confidence: 99%

Infections of Cryptocaryon irritans on wild fish from southeast Queensland, Australia

Diggles¹,

Lester²

1996

Dis. Aquat. Org.

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Wild-caught marine fish from 3 sites in SE Queensland, Australia, were examined over a period of up to 13 mo for infections of the parasitic ciliate Cryptocaryon irritans. Infections of C. irritans were found to be common on the fish sampled. Out of a total of 358 fish (14 species), 239 (66.7%) from 13 species were found to be infected. At Site 1 at the mouth of an estuary, the prevalence of C. irritans infections was 79% and the mean intensity was 12.9 parasites fish-'. At Site 2, a coastal bar area, the prevalence of infection dropped to 66 % and a mean intensity of 5.0 parasites fish-', whilst at Site 3 on the Great Barrier Reef, prevalence was lowest at 51 % with a mean intensity of 2.3 parasites fish-' The study concentrated on 2 sparid fishes, Acanthopagrus australis from Sites 1 and 2 and Gymnocranius audleyi from Site 3. The prevalence of infections on A. australis from Site 1 (n = 101) was 100% with a mean intensity of 14.6 parasites fish-', whilst at Site 2 (n = 74) the prevalence was 88 % at a mean intensity of 5.2 parasites fish-'. There was no apparent seasonality In prevalence or intensity of infections at Sites 1 and 2 despite water temperatures ranging between 15 and 27°C. At Site 3, the prevalence of infections of G. audleyi (n = 39) was 38% with a mean intensity of 1.9 parasites fish-'. The diameter of the tomonts collected from A. australis from Sites 1 and 2 vaned inversely with water temperature, and was not related to host size. Our results show that infections of C vntans are common on wild fish, not rare as previously thought. This may be partially due to the increased sensitivity of our tomont collection technique. Our data suggest that C. irritansmay exhibit a degree of host specificity in the wild, and also that its natural distribution can be extended into estuaries and seasonally into warm temperate waters.

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Fish host range of seven isolates of Cryptocaryon irritans (Ciliophora)

Cited by 22 publications

References 2 publications

Cryptocaryon irritans(Ciliophora): acquired protective immunity in the thick-lipped mullet,Chelon labrosus

Cryptocaryon irritans(Ciliophora): acquired protective immunity in the thick-lipped mullet,Chelon labrosus

Characterization of Cryptocaryon irritans isolates from marine fishes in Mainland China by ITS ribosomal DNA sequences

Infections of Cryptocaryon irritans on wild fish from southeast Queensland, Australia

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