Theileriosis in sheep and goats in the Sultanate of Oman

Tageldin, Mohammed H.; Fadiya, A. Al-Kitany; Sabra, A. Al-Yahyae; Ismaily, S. I. Al-I

doi:10.1007/s11250-005-2475-4

Cited by 25 publications

(29 citation statements)

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“…According to a previous study, macroschizont and microschizont have been found in the liver, spleen, lung, kidney, and lymph nodes in sheep (Yin et al, 2003). The prominent pathological features include enlargement of lymph nodes, lung edema, splenomegaly, liver enlargement, and mucosal ulceration of the abomasum (Oryan et al, 2013;Tageldin et al, 2005).…”

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confidence: 94%

An experimental ovine Theileriosis: The effect of Theileria lestoquardi infection on cardiovascular system in sheep

et al. 2016

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confidence: 94%

An experimental ovine Theileriosis: The effect of Theileria lestoquardi infection on cardiovascular system in sheep

et al. 2016

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“…Malignant ovine theileriosis (MOT) was first described in Egypt in an imported animal from Sudan (Littlewood, 1915), and then reported in Iraq (Latif et al, 1977), India (Sisodia, 1981), Sudan (El Ghali & El Hussein, 1995), Turkey (Sayin et al, 1997), Iran (Spitalska et al, 2005), Saudi Arabia (El-Azazy et al, 2001) and the Sultanate of Oman (Tageldin et al, 2005;Shayan et al, 2011). However, it has not been reported in Jordan (Sherkov et al, 1977) or Israel (Pipano, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…However, it has not been reported in Jordan (Sherkov et al, 1977) or Israel (Pipano, 1991). Although molecular surveys have confirmed the presence of T. lestoquardi in Iran (Ghaemi et al, 2012), Sudan (Salih et al, 2003;El Imam & Taha, 2015) and the Sultanate of Oman (Tageldin et al, 2005), there is a paucity of information on the distribution of this pathogen. In Oman, local sheep breeds are highly susceptible to ovine theileriosis caused by both T. lestoquardi and T. ovis (Al-Fahdi et al, 2017) with a large proportion of sheep hosting mixed infections with these species along with T. annulata (Al-Weheibi, 2011).…”

Section: Introductionmentioning

confidence: 99%

Theileria lestoquardi in Sudan is highly diverse and genetically distinct from that in Oman

Awad

Al-Hamidhi

Hussein

et al. 2018

Infection, Genetics and Evolution

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Malignant ovine theileriosis is a severe tick-borne protozoan disease of sheep and other small ruminants which is widespread in sub-Saharan Africa and the Middle East. The disease is of considerable economic importance in Sudan as the export of livestock provides a major contribution to the gross domestic product of this country. Molecular surveys have demonstrated a high prevalence of sub-clinical infections of Theileria lestoquardi, the causative agent, among small ruminants. No information is currently available on the extent of genetic diversity and genetic exchange among parasites in different areas of the country. The present study used a panel of T. lestoquardi specific micro- and mini-satellite genetic markers to assess diversity of parasites in Sudan (Africa) and compared it to that of the parasite population in Oman (Asia). A moderate level of genetic diversity was observed among parasites in Sudan, similar to that previously documented among parasites in Oman. However, a higher level of mixed-genotype infection was identified in Sudanese animals compared to Omani animals, consistent with a higher rate of tick transmission. In addition, the T. lestoquardi genotypes detected in these two countries form genetically distinct groups. The results of this work highlight the need for analysis of T. lestoquardi populations in other endemic areas in the region to inform on novel approaches for controlling malignant theileriosis.

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“…Malignant Ovine Theileriosis (MOT) or Malignant Small Ruminant Theileriosis (Smith and Sherman, 2011) is a parasitic disease of sheep, caused by Theileria lestoquardi and mainly transmitted by Hyalomma anatolicum. Sheep are considered a very receptive host for T. lestoquardi, as infection usually evolves into subacute and acute theileriosis even in indigenous sheep (Tageldin et al, 1992;El Hussein et al, 1998;Tageldin et al, 2005;El Imam et al, 2015). Globally, high morbidity and mortality rates have been reported in Iran (Hooshmand-Rad, 1977), Sudan (Salih et al, 2003;El Imam et al, 2015), and in Sultanate of Oman (Tageldin et al, 2005).…”

Section: General Introductionmentioning

confidence: 99%

“…Sheep are considered a very receptive host for T. lestoquardi, as infection usually evolves into subacute and acute theileriosis even in indigenous sheep (Tageldin et al, 1992;El Hussein et al, 1998;Tageldin et al, 2005;El Imam et al, 2015). Globally, high morbidity and mortality rates have been reported in Iran (Hooshmand-Rad, 1977), Sudan (Salih et al, 2003;El Imam et al, 2015), and in Sultanate of Oman (Tageldin et al, 2005). Sheep from disease-free zones suffer high morbidity when introduced to endemic areas and significant mortality rates are expected (El Imam et al, 2015).…”

Section: General Introductionmentioning

confidence: 99%

Malignant Ovine Theileriosis ( Theileria Lestoquardi ) : A Review

Imam¹,

Taha²

2015

JJBS

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Malignant Ovine Theileriosis (MOT) is a tick borne disease of sheep and goats, caused by Theileria lestoquardi and is considered a major constraint for sheep production in many areas of the world. It has been reported to infect lymphocytes in vivo and in vitro and the schizonts differentiate into macro-schizonts and micro-schizonts. To date, little is known about the mechanisms involved in the disease pathogenesis, but its high mortality is likely to be linked to the ability of T. lestoquardi to stimulate uncontrolled proliferation of the infected leukocyte. Consequently, severe tissue destruction and pulmonary oedema leading to respiratory failure are thought to be the cause of death. Despite an immense amount of small ruminant research, MOT remains an important disease of sheep and goats. Therefore, the present review outlines the current knowledge covering T. lestoquardi transmission, distribution, pathogenesis, diagnosis and control. The information may assist in filling the gaps in our knowledge about the economic impact of the disease and new research initiatives. We conclude that the development of a simple, affordable and applicable diagnostic test for an early detection at the field level, and the production of an effective vaccine could have a significant impact on the control of the disease.

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Theileriosis in sheep and goats in the Sultanate of Oman

Cited by 25 publications

References 4 publications

An experimental ovine Theileriosis: The effect of Theileria lestoquardi infection on cardiovascular system in sheep

An experimental ovine Theileriosis: The effect of Theileria lestoquardi infection on cardiovascular system in sheep

Theileria lestoquardi in Sudan is highly diverse and genetically distinct from that in Oman

Malignant Ovine Theileriosis ( Theileria Lestoquardi ) : A Review

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