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- Title
Oestrus ovis nei piccoli ruminanti.
- Authors
Tamponi, Claudia; Carta, Carlo; Fahad, Ahmed; Cavallo, Lia; Porcu, Francesca; Scala, Antonio; Varcasia, Antonio
- Abstract
Oestrosis is a myiasis caused by larval forms of Oestrus ovis, a diptera living in the nasal cavities of domestic and wild small ruminants. The adult fl y is 14mm long and has two pairs of wings, one of which is rudimentary and eyes and olfactory sensory organs developed and adapted to its parasitic attitude and for the recognition of the host. Female fl ies after mating spray on the nose and conjunctiva of hosts up to 25 fi rst-stage larvae (L1) at time. In the host larvae develop until L3, and once matured, reach the external habitat passively with the sneezing of the ruminants. Larvae pupate in the ground and then in a variable period of time depending on environmental conditions form the adult insect. The disease is widely spread in Italy, investigations carried out in the past years indicate its presence in all areas where sheep extensive farming is carried out with prevalence of 38% in Puglia, 51% in Emilia Romagna, 56% in Sicily and 91% in Sardinia. Generally the symptomatology is more evident during the development phase and endogenous activity of the adult. The diagnosis can be made only at autopsy with the direct examination of the nasal cavity and sinuses. Clinical symptoms often, however, provides little guidance on the presence of myiasis being also related to individual sensitivity and bacterial complications. Some authors have measured the extent of the symptoms by assigning a score to the presence of serous drainage, mucous, purulent, and diffi culty breathing. This approach is valid result as a measure of the remission of symptoms after therapeutic treatment against O. ovis, while at individual level does not provide a measure of the infesting charge.
- Publication
Summa, Animali da Reddito, 2023, Vol 18, Issue 6, p4
- ISSN
1828-5546
- Publication type
Article