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Report of an Outbreak of Peste Des Petits Ruminants in Iran, Clinical, Epidemiological and Pathological Study

Mohammad Reza Mohebbi


Masoumeh Heydary-Sureshjani


Seyed Hossein Marjanmehr


Sahar Ghaffari Khaligh

Mohammad Reza Mohebbi 1 ,

Masoumeh Heydary-Sureshjani 1 

Seyed Hossein Marjanmehr 3 Sahar Ghaffari Khaligh 3 

  1. Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Qareeb Street , Azadi Avenue, Tehran, Iran 1

  2. Department of Pathology, Faculty of Veterinary Medicine, Tehran, Iran 3

Pages: 1-9

DOI: 10.18488/journal.110.2018.41.1.9

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Article History:

Received: 03 September, 2018
Revised: 08 October, 2018
Accepted: 12 November, 2018
Published: 05 December, 2018


Peste des petits ruminants (PPR) is an acute to sub-acute highly contagious and frequently fatal viral disease of goats and sheep and wild small ruminants caused by a virus in the genus morbilivirus, family paramyxoviridae. The flock of sheep including 800 fattening sheep were affected and the presence of PPR virus was assayed with RT-PCR test. The only significant change in the CBC was leucopenia. There were typical lesions on dental pad, hard palate, gingiva and tongue. The Morbidity and case fatality rates were estimated 50 and 60 percent, respectively. All deaths were happen in lambs and young sheep. Results of the histopathologcal findings indicated that the lesions were mainly located on the respiratory system, upper digestive system, kidney and lymphoid organs. Infiltration of mononuclear and inflammatory cells in lamina propria were seen in mouth, soft palate, intestines, lung, and tonsil. Secondary infection as result of immunosuppression activity of the PPR virus was happened and resulted in high mortality and case fatality. The present paper reports an outbreak of PPR in a sheep flock in Karaj, Alborz province in Iran, including pathological, and clinical observation and also serological detection.
Contribution/ Originality
This study documents that PPR virus is severely immunosupressor and secondary infection is inevitable in outbreak. In clinical examination most suggestive symptom is the buccal cavity lesions and in necropsy, lung is the organ with most severe lesions. All the outbreaks with high morbidity and mortality, occur in unvaccinated flocks.


Peste des petits ruminants, Iran, Outbreak, Histopathology, Immunosuppression, Epidemiology.




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This study received no specific financial support.

Competing Interests:

The authors declare that they have no competing interests.


All authors contributed equally to the conception and design of the study.

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