Oestrus ovis (DIPTERA: OESTRIDAE) EN OVINOS EN CUBA

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Abstract

Se describe, de manera preliminar, la sintomatología clínica de oestrosis en ovinos de la región oriental de Cuba. Se muestra la presencia de larvas de diferentes estadios, en senos nasales de los animales infestados.

Translated abstract

The symptoms of oestrosis in sheep are preliminary described in the eastern part of Cuba. The presence of larvae at different stages is shown in nasal sinuses of the infected animals.

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Most cited references 15

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Sheep oestrosis (Oestrus ovis Linné 1761, Diptera: Oestridae) in Sardinia, Italy.

A Scala, G. Solinas, C V Citterio … (2001)

Oestrosis, the nasal myiasis of sheep and goats, is caused by the larvae of Oestrus ovis L. 1758 (Diptera, Oestridae) that develop from the first to the third stage larva in the nasal cavities and frontal sinuses of affected animals. The authors report the results of an epidemiological study of oestrosis of sheep in Sardinia, Italy. Heads of 6-month to 10-year-old Sardinian sheep (n=566) from 124 free-ranging flocks were examined for the presence and location O. ovis larvae from December 1996 to November 1997. Larvae were collected, counted, and larval stages were identified. O. ovis larvae were found in 100% of examined flocks and in 91% (514/566) of examined sheep. The monthly prevalence ranged from 69% in May to 100% in July. First stage larvae were found in 82% (463) of all heads examined, second stage larvae in 65% (367) and third stage larvae in 10% (56). The majority of sheep harboured first stage larvae, with prevalences of over 80% throughout most of the study period. The prevalence of O. ovis found in this study of Sardinian sheep is the highest reported in the Mediterranean area. The high percentage of first stage larvae found throughout the entire study period may be due to a brief period of decreased rate of larval maturation, in particular in December 1996 (96%) and January-October 1997 (94%). Third stage larvae were consistently present, often however, with extremely low prevalences compared to total larval burden.

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Myiasis as a risk factor for prion diseases in humans.

O Lupi (2006)

Prion diseases are transmissible spongiform encephalopathies of humans and animals. The oral route is clearly associated with some prion diseases, according to the dissemination of bovine spongiform encephalopathy (BSE or mad cow disease) in cattle and kuru in humans. However, other prion diseases such as scrapie (in sheep) and chronic wasting disease (CWD) (in cervids) cannot be explained in this way and are probably more associated with a pattern of horizontal transmission in both domestic and wild animals. The skin and mucous membranes are a potential target for prion infections because keratinocytes and lymphocytes are susceptible to the abnormal infective isoform of the prion protein. Iatrogenic transmission of Creutzfeldt-Jakob disease (CJD) was also recognized after corneal transplants in humans and scrapie was successfully transmitted to mice after ocular instillation of infected brain tissue, confirming that these new routes could also be important in prion infections. Some ectoparasites have been proven to harbour prion rods in laboratory experiments. Prion rods were identified in both fly larvae and pupae; adult flies are also able to express prion proteins. The most common causes of myiasis in cattle and sheep, closely related animals with previous prion infections, are Hypoderma bovis and Oestrus ovis, respectively. Both species of flies present a life cycle very different from human myiasis, as they have a long contact with neurological structures, such as spinal canal and epidural fat, which are potentially rich in prion rods. Ophthalmomyiases in humans is commonly caused by both species of fly larvae worldwide, providing almost direct contact with the central nervous system (CNS). The high expression of the prion protein on the skin and mucosa and the severity of the inflammatory response to the larvae could readily increase the efficiency of transmission of prions in both animals and humans.

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The respiratory and allergic manifestations of human myiasis caused by larvae of the sheep bot fly (Oestrus ovis): a report of 33 pharyngeal cases from southern Iran.

M Masoodi, K. Hosseini (2003)

Myiasis--the feeding of fly larvae on living mammals--may have various presentations, depending on the tissues or organs involved. The respiratory and non-respiratory manifestations of human pharyngeal myiasis caused by Oestrus ovis larvae in 33 patients from the Fars province, in southern Iran, are described here. All but one of the 33 cases were male and all lived in rural areas, in close contact with sheep and goats. The myiasis only occurred in spring and summer (April-September). Symptoms always appeared abruptly, all of the cases sensing the presence of foreign bodies in their throats, a burning sensation and itching in the throat being followed by cough and then various other respiratory, nasal, aural, and eye manifestations. Fly larvae were observed directly in the throats of five patients, and recovered in throat washings from all 33 cases. All of the larvae were identified as those of the sheep bot fly (Oestrus ovis). Removal of the larvae, by irrigation of the throat with a large volume of normal saline, provided an effective and fast treatment. In Iran at least, myiasis caused by Oestrus ovis larvae should be considered an occupational disease among farmers who keep sheep and goats.

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Contributors

Vilmaris Matos Moya: Role: ND

Roy Torres: Role: ND

Dasniellis Betancourt Rodríguez: Role: ND

Luis Frómeta: Role: ND

Magdiela Díaz Matos: Role: ND

Zoe Dubrooks Chivas: Role: ND

Alina Elias Peña: Role: ND

J.G Rodríguez Diego: Role: ND

P Alfonso: Role: ND

C Bulnes: Role: ND

Journal

Journal ID (publisher): rsa

Title: Revista de Salud Animal

Abbreviated Title: Rev Salud Anim.

Publisher: Centro Nacional de Sanidad Agropecuaria (La Habana )

ISSN: 2224-4700

Publication date (Print): December 2008

Volume: 30

Issue: 3

Pages: 189-191

Affiliations

[1 ] Centro de Desarrollo de la Montaña (CDM) Cuba

[2 ] Instituto de Medicina Veterinaria (IMV) Guantánamo Cuba

[3 ] Centro Nacional de Sanidad Agropecuaria Cuba

Article

Publisher ID: S0253-570X2008000300009

SO-VID: 5e0064f4-669d-44ae-8d89-ba93b940827f

License:

http://creativecommons.org/licenses/by/4.0/

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SciELO Cuba

Self URI (journal page): http://scielo.sld.cu/scielo.php?script=sci_serial&pid=0253-570X&lng=en

Oestrus ovis (DIPTERA: OESTRIDAE) EN OVINOS EN CUBA Translated title: Oestrus ovis (DIPTERA: OESTRIDAE) IN SHEEP IN CUBA

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SciELO Cuba

Most cited references 15

Sheep oestrosis (Oestrus ovis Linné 1761, Diptera: Oestridae) in Sardinia, Italy.

Myiasis as a risk factor for prion diseases in humans.

The respiratory and allergic manifestations of human myiasis caused by larvae of the sheep bot fly (Oestrus ovis): a report of 33 pharyngeal cases from southern Iran.

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