%0 Journal Article
%T High Mortality Rate due to False Gid in a Sheep Herd
%A Ali Asghar Mozaffari
%A Saeedeh Shojaeepour
%A Shahin Ghahremani Ghareh Cheshmeh
%J ISRN Veterinary Science
%D 2013
%R 10.1155/2013/650358
%X The sheep nasal bot, Oestrus ovis (Diptera: Oestridae), is a cosmopolitan parasite commonly found in sheep and occasionally goats. Rarely a bot will migrate into the sheep brain (false gid). Following the complaint of an animal husbandman about high mortality rate in a sheep herd, the herd was clinically, hematologically, and pathologically examined exactly. Clinical, hematological, and pathological findings were described in the text. Necropsy findings showed heavy infestation with Oestrus ovis larvae. The herd was treated with Ivermectin. After treatment all patients without nervous sings were recovered. Patients with nervous signs did not respond to treatment, but new cases of disease did not occur and the mortality stopped. In the present report, a high mortality rate due to false gid in a sheep herd was described. The prevention and control of the disease are important because of economic losses and the possibility of transmission to the human. 1. Introduction The sheep nasal bot, Oestrus ovis (Diptera: Oestridae), is a cosmopolitan parasite commonly found in sheep and occasionally goats. The disease has a higher prevalence in tropical areas. Adult flies deposit larvae in or near the sheep¡¯s nostrils and the first instars move into the nasal passages where they feed on nasal secretion. Larvae migrate to the frontal sinuses and complete two molts before returning to the nasal passages, from where they are expelled by sneezing [1, 2]. The duration of this parasitic portion of the life cycle varies considerably from a few weeks to several months, depending on the season and climatic conditions [3]. Clinical symptoms, depending on the infected area and larvae numbers, are different. Clinical respiratory signs such as seromucous or purulent nasal discharge, frequent sneezing, and dyspnea may severely impair the health of affected animals [4]. Rarely a bot will migrate into the sheep brain (false gid) [5]. In the present report, a high mortality rate due to false gid in a sheep herd was described. 2. History and Results Following the complaint of an animal husbandman about high mortality rate (10%) in a sheep herd, the herd was clinically, hematologically, and pathologically examined exactly. In clinical examination, clinical signs such as sneezing, serosanguinous nasal discharge (Figure 1), hyperemic nasal mucosa, depression (Figure 2), circling, head pressing, aimless wandering, compulsive walking, blindness, and ataxia were observed. Vital signs including temperature, heart, and respiratory rates were normal. Hematological examination including RBC,
%U http://www.hindawi.com/journals/isrn.veterinary.science/2013/650358/