Molecular surveillance of &lt;i&gt;Theileria ovis, Theileria lestoquardi&lt;/i&gt; and &lt;i&gt;Theileria annulata&lt;/i&gt; infection in sheep and ixodid ticks in Iran

Razmi, Gholam Reza; Yaghfoori, Saeed

doi:10.4102/ojvr.v80i1.635

Cited by 29 publications

(17 citation statements)

References 23 publications

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“…Microscopic examination could detect infection mostly in clinically infected animals, whereas with PCR a higher number of apparently healthy animals were also detected as positive. This finding suggests the superiority of PCR in detecting sub-clinical status and/or carrier status of theileriosis (ALTAY et al, 2005;RAZMI and YAGHFOORI, 2013). Adoption of a sensitive molecular detection tool, such as PCR-RFLP, will not only throw light on the true prevalence of infection, but also help in accurate disease diagnosis, which is imperative for sustainable disease control.…”

Section: Discussionmentioning

confidence: 99%

Molecular identification of caprine carriers of theileriosis in South India

Nagaraj¹,

Lakshmanan²,

Lonappan³

et al. 2019

Vet. arhiv

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The rising prevalence of tick borne parasites and their economic impact on livestock production have often demanded better diagnostic tools and timely treatment options. The paper reports the molecular evidence of natural infections of Theileria ovis, T. lestoquardi and T. luwenshuni among goats in Kerala, south India, using PCR and RFLP. Concurrent infection of T. ovis and T. luwenshuni was also identified. Out of 150 samples studied, the PCR protocol was also found to detect a higher prevalence (59.3%) of theileriosis when compared to the detection of piroplasms (30%) in stained blood smears. In this study, the majority of goats were infected with T. ovis (75.28%), followed by those with T. luwenshuni (32.58%) and T. lestoquardi (7.86%). A high proportion of infected goats did not show any clinical signs indicating carrier status of infection. The carrier status of animals also signals the possible risk of disease transmission to healthy stock. However, a high incidence of caprine theileriosis, with significant haematological alterations including macrocytic hypochromic anaemia and thrombocytopenia, poses a potential threat to the goat population in the event of stress. Routine monitoring should be employed in farms for early detection and treatment of carrier animals.

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Section: Discussionmentioning

confidence: 99%

Molecular identification of caprine carriers of theileriosis in South India

Nagaraj¹,

Lakshmanan²,

Lonappan³

et al. 2019

Vet. arhiv

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“…T. ovis and T. separata are mainly identified in small or medium sized wild and domestic ruminants. Elsewhere, both Theileria ovis and Theileria separata , beside Theileria lestoquardi , are the cause of ovine theileriosis in sheep and goats [ 35 , 36 ]. However, the occurrence and species of Theileria infecting sheep and goats in Kenya are not known.…”

Section: Discussionmentioning

confidence: 99%

Molecular Detection and Characterization of Theileria Infecting Wildebeest (Connochaetes taurinus) in the Maasai Mara National Reserve, Kenya

et al. 2015

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Theileria is a genus of tick-borne protozoan that is globally widespread and infects nearly all ungulates in which they cause either latent infection or lethal disease. Wild animals are considered reservoir hosts of many species of Theileria and their diversity in wildlife species is increasingly becoming of interest. The molecular characterization and identification of Theileria infecting wildlife has been studied in a few species including buffalo, which are considered reservoir host for Theileria parva infecting cattle. In this study, we sequenced Theileria species infecting wildebeest (Connochaetes taurinus) and used molecular-genetic and phylogenetic analysis of the 18 Small Subunit of the Ribosomal RNA (18S rRNA) to identify their relationships with known species of Theileria. Our results revealed three new Theileria haplotypes infecting wildebeest. Phylogenetic analysis revealed that haplotype 1 and 2 clustered in the same clade as Theileria separata and with Theileria sp. isolated from other small to medium sized antelopes. Haplotype 3 clustered close to the Theileria ovis clade. This is the first molecular description and characterization of Theileria species infecting blue wildebeest in East Africa. This study demonstrates the potential for Theileria transmission between wildebeest and small domestic ungulates, such as sheep and goats.

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“…While there is no report on T. ovis prevalence in the goat population in Iran, the prevalence of T. lestoquardi is 6.25% and 19% in West Azerbaijan and Kurdistan provinces, respectively, in western Iran (21, 22). The prevalence of T. lestoquardi in sheep ranges from 6.6% in Razavi Khorasan province in northeast Iran to 33% in Fars province in central Iran, which is one of the most important endemic regions for ovine theileriosis in Iran (10, 23). T. ovis is more prevalent in sheep and ranges from 13.2% in western Iran to 73% in central Iran (10, 23).…”

Section: Resultsmentioning

confidence: 99%

“…The prevalence of T. lestoquardi in sheep ranges from 6.6% in Razavi Khorasan province in northeast Iran to 33% in Fars province in central Iran, which is one of the most important endemic regions for ovine theileriosis in Iran (10, 23). T. ovis is more prevalent in sheep and ranges from 13.2% in western Iran to 73% in central Iran (10, 23). The overall infection rate of T. lestoquardi in this study was 1.5%, which is relatively low compared to the previous reports from Iran (21, 22).…”

Section: Resultsmentioning

confidence: 99%

Plasmodium capraeinfection is negatively correlated with infection ofTheileria ovisandAnaplasma ovisin goats

Hakimi

Sarani

Takeda

et al. 2019

Preprint

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Theileria, Babesia, and Anaplasma are tick-borne pathogens affecting livestock industries worldwide. In this study, we surveyed the presence of Babesia ovis, Theileria ovis, Theileria lestoquardi, Anaplasma ovis,Anaplasma phagocytophilum, and Anaplasma marginale in 200 goats from 3 different districts in Sistan and Baluchestan province, Iran. Species-specific diagnostic PCR and sequence analysis revealed that 1.5%, 12.5%, and 80% of samples were positive for T. lestoquardi, T. ovis, and A. ovis, respectively. Co-infections of goats with up to 3 pathogens were seen in 22% of the samples. We observed a positive correlation between A. ovis and T. ovis infection. In addition, by analyzing the data with respect to Plasmodium caprae infection in these goats, a negative correlation was found between P. caprae and A. ovis and between P. caprae and T. ovis. This study contributes to understanding the epidemiology of vector-borne pathogens and their interplay in goats.

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Molecular surveillance of <i>Theileria ovis, Theileria lestoquardi</i> and <i>Theileria annulata</i> infection in sheep and ixodid ticks in Iran

Cited by 29 publications

References 23 publications

Molecular identification of caprine carriers of theileriosis in South India

Molecular identification of caprine carriers of theileriosis in South India

Molecular Detection and Characterization of Theileria Infecting Wildebeest (Connochaetes taurinus) in the Maasai Mara National Reserve, Kenya

Plasmodium capraeinfection is negatively correlated with infection ofTheileria ovisandAnaplasma ovisin goats

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