The urticating setae of Ochrogaster lunifer, an Australian processionary caterpillar of veterinary importance

Perkins, L.E., Zalucki, M.P., Perkins, N.R., Cawdell-Smith, A.J., Todhunter, K.H., Bryden, W.L. and Cribb, B.W. (2015) The urticating setae of Ochrogaster lunifer, an Australian processionary caterpillar of veterinary importance. Medical and Veterinary Entomology, 30 2: 241-245. doi:10.1111/mve.12156


Author Perkins, L.E.
Zalucki, M.P.
Perkins, N.R.
Cawdell-Smith, A.J.
Todhunter, K.H.
Bryden, W.L.
Cribb, B.W.
Title The urticating setae of Ochrogaster lunifer, an Australian processionary caterpillar of veterinary importance
Journal name Medical and Veterinary Entomology   Check publisher's open access policy
ISSN 1365-2915
0269-283X
Publication date 2015-12-16
Year available 2015
Sub-type Article (original research)
DOI 10.1111/mve.12156
Open Access Status Not yet assessed
Volume 30
Issue 2
Start page 241
End page 245
Total pages 5
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2016
Language eng
Formatted abstract
The bag-shelter moth, Ochrogaster lunifer Herrich-Schaffer (Lepidoptera: Notodontidae), is associated with a condition called equine amnionitis and fetal loss (EAFL) on horse farms in Australia. Setal fragments from O. lunifer larvae have been identified in the placentas of experimentally aborted fetuses and their dams, and in clinical abortions. The gregarious larvae build silken nests in which large numbers cohabit over spring, summer and autumn. The final instars disperse to pupation sites in the ground where they overwinter. Field-collected O. lunifer larvae, their nests and nearby soil were examined using light and electron microscopy to identify setae likely to cause EAFL and to determine where and how many were present. Microtrichia, barbed hairs and true setae were found on the exoskeletons of the larvae. True setae matching the majority of setal fragments described from equine tissue were found on third to eighth instar larvae or exuviae. The number of true setae increased with the age of the larva; eighth instars carried around 2.0–2.5 million true setae. The exuvia of the pre-pupal instar was incorporated into the pupal chamber. The major sources of setae are likely to be nests, dispersing pre-pupal larvae and their exuviae, and pupal chambers.
Keyword Lepidoptera
Notodontidae
Thaumetopoeidae
Bag-shelter moth
Equine amnionitis and fetal loss (EAFL)
True setae
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

 
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