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<p>Coenurosis is a neurological parasitic disease caused by the larval stage of <i>Taenia multiceps</i> (<i>Coenurus cerebralis</i>), capable of inducing substantial economic losses, particularly in regions where sheep farming is prevalent. In one semi-industrial sheep raising farm, two ewes (case 1 with respiratory distress such as tachypnea and open-mouth breathing, and case 2 with severe neurological signs such as nystagmus, ataxia, frequent seizures, and pedaling) were examined. In hematological examinations, only the serum fibrinogen level was elevated in both cases, along with increased protein concentration and total nucleated cell count in the cerebrospinal fluid (CSF). At necropsy, case 1 revealed two degenerated and calcified parasitic cystic structures in the left parietal lobe, exhibiting a fistulated appearance. Histopathological examination showed psammomatous calcification, lymphocytic meningitis, lymphocytic perivascular cuffing, perivascular edema, and granulomatous encephalitis. In case 2, a small calcified cyst was detected on the cut surface of the medulla oblongata. Additionally, lymphocytic meningitis, granulation tissue formation, mild fibrosis, diffuse hyperemia, lymphocytic perivascular cuffing, and granulomatous encephalitis were observed. The increasing population of stray dogs in Iran is likely to lead to a higher incidence of coenurosis in sheep. Considering the parasite’s strong preference for central nervous system tissue, this could result in greater involvement of diverse brain regions and, consequently, a rise in atypical clinical manifestations.</p>

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An unusual presentation of Coenurosis cerebralis in two ewes

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Peyman Dehghan Rahimabadi,
  • Diba Golchin,
  • Mohammad Hasan Naji Zadeh,
  • Fatemeh Hashemi Haghighi,
  • Azin Rostami

摘要

Coenurosis is a neurological parasitic disease caused by the larval stage of Taenia multiceps (Coenurus cerebralis), capable of inducing substantial economic losses, particularly in regions where sheep farming is prevalent. In one semi-industrial sheep raising farm, two ewes (case 1 with respiratory distress such as tachypnea and open-mouth breathing, and case 2 with severe neurological signs such as nystagmus, ataxia, frequent seizures, and pedaling) were examined. In hematological examinations, only the serum fibrinogen level was elevated in both cases, along with increased protein concentration and total nucleated cell count in the cerebrospinal fluid (CSF). At necropsy, case 1 revealed two degenerated and calcified parasitic cystic structures in the left parietal lobe, exhibiting a fistulated appearance. Histopathological examination showed psammomatous calcification, lymphocytic meningitis, lymphocytic perivascular cuffing, perivascular edema, and granulomatous encephalitis. In case 2, a small calcified cyst was detected on the cut surface of the medulla oblongata. Additionally, lymphocytic meningitis, granulation tissue formation, mild fibrosis, diffuse hyperemia, lymphocytic perivascular cuffing, and granulomatous encephalitis were observed. The increasing population of stray dogs in Iran is likely to lead to a higher incidence of coenurosis in sheep. Considering the parasite’s strong preference for central nervous system tissue, this could result in greater involvement of diverse brain regions and, consequently, a rise in atypical clinical manifestations.