Detection of spirorchiid trematodes in gastropod tissues by polymerase chain reaction

Preliminary identification of an intermediate host of learedius learedi

Brian A. Stacy, Thomas Frankovich, Ellis Greiner, A. Rick Alleman, Lawrence H. Herbst, Paul Klein, Alan Bolten, Antoinette McIntosh, Elliott R. Jacobson

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Marine spirorchiid trematodes are associated with morbidity and mortality in sea turtles worldwide. The intermediate hosts remain unknown, and discovery efforts are hindered by the large number and great diversity of potential hosts within sea turtle habitats, as well the potential for low prevalence and overdispersion. A high-throughput DNA extraction and polymerase chain reactionbased method was developed to detect the internal transcribed spacer 2 (ITS2) region of the ribosomal gene of 2 spirorchiid genera, Learedius and Hapalotrema, within pooled samples of gastropod tissues. A model system consisting of freshwater snail (Pomacea bridgesii) tissues and DNA extracts spiked with adult Learedius learedi and known quantities of spirorchiid DNA was used to develop and test the technique. Threshold of detection was found to be equivalent to an early prepatent infection within 1.5 g of gastropod tissue. This technique was used to screen approximately 25 species of marine gastropods at a captive facility where green turtles (Chelonia mydas) become infected by L. learedi. The parasite was detected in a sample of knobby keyhole limpet (Fissurella nodosa), thus providing the first evidence of an intermediate host for a marine spirorchiid trematode. This technique has many potential applications in trematode life cycle discovery studies.

Original languageEnglish (US)
Pages (from-to)752-757
Number of pages6
JournalJournal of Parasitology
Volume96
Issue number4
DOIs
StatePublished - Aug 2010

Fingerprint

intermediate host
Gastropoda
Turtles
intermediate hosts
Trematoda
turtle
gastropod
polymerase chain reaction
DNA
Polymerase Chain Reaction
Chelonia mydas
sea turtles
Tissue Extracts
Pomacea
Snails
DNA-Directed DNA Polymerase
morbidity
Life Cycle Stages
Fresh Water
snail

ASJC Scopus subject areas

  • Parasitology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Detection of spirorchiid trematodes in gastropod tissues by polymerase chain reaction : Preliminary identification of an intermediate host of learedius learedi. / Stacy, Brian A.; Frankovich, Thomas; Greiner, Ellis; Alleman, A. Rick; Herbst, Lawrence H.; Klein, Paul; Bolten, Alan; McIntosh, Antoinette; Jacobson, Elliott R.

In: Journal of Parasitology, Vol. 96, No. 4, 08.2010, p. 752-757.

Research output: Contribution to journalArticle

Stacy, Brian A. ; Frankovich, Thomas ; Greiner, Ellis ; Alleman, A. Rick ; Herbst, Lawrence H. ; Klein, Paul ; Bolten, Alan ; McIntosh, Antoinette ; Jacobson, Elliott R. / Detection of spirorchiid trematodes in gastropod tissues by polymerase chain reaction : Preliminary identification of an intermediate host of learedius learedi. In: Journal of Parasitology. 2010 ; Vol. 96, No. 4. pp. 752-757.
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