Survival of Phortica variegata experimentally and naturally infected with Thelazia callipaeda.
Diapause
Drosophilidae
eyeworm
fat composition
vector
Journal
Medical and veterinary entomology
ISSN: 1365-2915
Titre abrégé: Med Vet Entomol
Pays: England
ID NLM: 8708682
Informations de publication
Date de publication:
06 2020
06 2020
Historique:
received:
04
08
2019
revised:
21
10
2019
accepted:
27
10
2019
pubmed:
28
11
2019
medline:
4
11
2020
entrez:
28
11
2019
Statut:
ppublish
Résumé
Knowledge of the effects that Thelazia callipaeda (Spirurida, Thelaziidae) infection has on the survival of its vector Phortica variegata (Drosophilidae, Steganinae) is scarce. The present study aimed to: (a) assess the rate of infection between experimentally infected (EI) and not experimentally infected (NEI) flies and (b) determine how T. callipaeda infection may affect the survival of P. variegata. In addition, fat composition was evaluated in flies that died during overwintering. Molecular analysis showed that T. callipaeda prevalence in flies that died before experimental infection, plus those from the NEI group, is 0.75% (i.e. 11 out of 1462 individuals). The EI group showed a significantly higher positivity to T. callipaeda (i.e. 51 out of 682 individuals; 7.48%) compared with the NEI group (i.e. 9 out of 750 individuals; 1.2%). Thelazia callipaeda DNA was detected until 147 days after experimental infection. This demonstrates that larvae of this eyeworm may survive in the fly for a significant period of the winter. Fat composition analysis showed that flies produced more unsaturated than saturated fatty acids during diapause, probably because unsaturated fatty acids remain in a liquid state at lower temperatures, providing anti-freeze properties to survive winter.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
201-206Informations de copyright
© 2019 The Royal Entomological Society.
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