A serological study of Babesia caballi and Theileria equi in Thoroughbreds in Trinidad

Asgarali, Zinora; Coombs, Dane; Mohammed, Fatima; Campbell, Michael H.; Caesar, Ernest

doi:10.1016/j.vetpar.2006.09.015

Cited by 47 publications

(36 citation statements)

References 8 publications

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“…In terms of gender, there were no significant differences between males and females in seropositivity to either T. equi (p=0.190) or B. caballi (p=0.901). Our observation is in accord with the results which were 33.3% to T. equi and 68.8% to B. caballi in Trinidad by IFAT (Asgarali et al 2007). The difference between seroprevalence rates for T. equi in the four districts was found statistically significant and Altunhisar had the lowest seroprevalence rate comparing to other districts for T. equi.…”

Section: Discussionsupporting

confidence: 91%

“…Besides, we observed a significantly increasing frequency of antibodies to B. caballi with age. In an IFAT study in Trinidad, Asgarali et al (2007) were observed a significantly increasing frequency of antibodies to T. equi with age. This state may be associated with the fact that horses infected with piroplasmosis can carry the parasite in their blood for many years, even if they recover from the initial disease.…”

Section: Discussionmentioning

confidence: 92%

“…caballi antibodies in horses has been reported in several countries. Seropositivity was found as 90% to B. caballi and 94% to T. equi by IFAT, 41% to B. caballi and 65% to T. equi by CFT in Cordoba (Tenter et al 1988), 59% to T. equi and 45% to B. caballi by IFAT and CFT in Brazil (Heuchert et al 1999), 81% to T. equi and 90% to B. caballi by LAT and ELISA in Brazil (Xuan et al 2001), 5.4% to B. caballi and 2.2% to T. equi by ELISA in Japan (Ikadai et al 2002), 34% to T. equi, 32% to B. caballi by ELISA in China (Xu et al 2003), 40% to T. equi and 28.3% B. caballi by IFAT in Spain (Camacho et al 2005), 33.3% to T. equi and 68.8% to B. caballi by IFAT (Asgarali et al 2007), 91% to T. equi and 83% to B. caballi by IFAT, 59.7% to T. equi and 12.5% to B. caballi by PCR in Brazil (Heim et al 2007). In addition, different prevalence results of equine piroplasmosis have been determined in Turkey.…”

Section: Discussionmentioning

confidence: 99%

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Investigation of seroprevalence of Theileria equi and Babesia caballi in horses in Nigde province, Turkey

Karatepe

Çakmak

et al. 2008

Trop Anim Health Prod

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The prevalence of equine piroplasmosis caused by Theileria equi and Babesia caballi in Nigde, in central Anatolia, Turkey has remained unknown. Serum samples were obtained from a total of 125 horses and were tested for antibodies to T. equi and B. caballi using the Indirect Fluorescence Antibody Test (IFAT). Twenty-three (18.4%) horses were seropositive for equine piroplasmosis. Anti-T. equi was observed in 16 horses (12.8%) while anti-B. caballi was detected in 12 horses (9.6%). In addition, 5 serum samples were positive for both parasites. The prevalence rates of antibodies to T. equi and B. caballi for female and male horses were statistically indifferent (p = 0.19 and 0.90). The difference between the seropositivity rates to T. equi among age groups was statistically insignificant (p = 0.44) while the difference to B. caballi among age groups is statistically significant (p = 0.01). Seropositivity rates ranged from 2.9% to 25.7% for T. equi and 2.9% to 14.3% for B. caballi from the selected districts in Nigde. A statistically significant difference on seropositivity rates for the study sites was observed for only T.equi (p = 0.03). This study indicates that T. equi is higher than B. caballi in Nigde.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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Investigation of seroprevalence of Theileria equi and Babesia caballi in horses in Nigde province, Turkey

Karatepe

Çakmak

et al. 2008

Trop Anim Health Prod

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“…Donkeys in this region are usually kept in a free range type of system with minimal input in terms of shelter and acaricide use (personal observation, D.O.O). Asgarali, et al (2007) similarly reported a lack of association among area seroprevalence values for T. equi in Trinidadian horses. Statistical relationships between T. equi prevalence and geographical area have, however, been demonstrated by Karetepe, et al (2009) andSteinman, et al (2012).…”

Section: Personal Observation Doo)mentioning

confidence: 97%

A field survey for the seroprevalence of Theileria equi and Babesia caballi in donkeys from Nuu Division, Kenya

Oduori

Onyango²,

Kimari³

et al. 2015

Ticks and Tick-borne Diseases

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Equine piroplasmosis is one of the most significant tick-borne disease of equids. The prevalence of this disease in donkeys of semi-arid Kenya remains largely unexplored. The primary objective of this study was to demonstrate the extent to which donkeys in Nuu division, Kenya have been exposed to the haemoprotozoans Babesia caballi and Theileria equi, the causative agents of equine piroplasmosis. The study also assessed the effect of age and sex on seroprevalence. A stratified sampling approach was used and three hundred and fourteen donkeys were sampled across nine sub-locations in Nuu division, Mwingi district. Serodiagnosis was via competitive inhibition enzyme linked immunosorbent assays (cELISA). The seroprevalence of T. equi was 81.2% (95% CI: 76.4-85.4). There was no significant difference in sub-location seropositivity, gender seropositivity or age related seropositivity. Antibodies against B. caballi were not detected (95% CI: 0-1.2). Findings from this study suggest that T. equi infection is endemic in Nuu division, Mwingi where it exists in a state of endemic stability. Existence of the infection should be communicated to animal health practitioners and donkey owning communities in the area.

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“…Babesia caballi and T. equi can both cause morbidity and in some cases mortality in equids. Fatality rates of at least 10% have been reported in domestic equids (OIE 2009) and disease associated with these parasites is therefore of considerable veterinary importance (Asgarali et al 2007;Motloang and Thekisoe 2008).…”

Section: Introductionmentioning

confidence: 99%

PREVALENCE OFTHEILERIA EQUIANDBABESIA CABALLIAS WELL AS THE IDENTIFICATION OF ASSOCIATED TICKS IN SYMPATRIC GREVY'S ZEBRAS (EQUUS GREVYI) AND DONKEYS (EQUUS AFRICANUS ASINUS) IN NORTHERN KENYA

Hawkins

Kock

McKeever

et al. 2015

Journal of Wildlife Diseases

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ABSTRACT:The role of equine piroplasmosis as a factor in the population decline of the Grevy's zebra is not known. We determined the prevalence of Babesia caballi and Theileria equi in cograzing Grevy's zebras (Equus grevyi) and donkeys (Equus africanus asinus) in northern Kenya and identified the associated tick vectors. Blood samples were taken from 71 donkeys and 16 Grevy's zebras from March to May 2011. A nested PCR reaction using 18s ribosomal (r)RNA primers on 87 blood spots showed 72% (51/71; 95% confidence interval [CI] 60.4-81.0%) of donkeys and 100% (16/16; 95% CI, 77.3-100%) of Grevy's zebras were T. equi positive. No samples were positive for B. caballi. Sequence comparison using the National Center for Biotechnology Information's basic local alignment search tool identified homologous 18s rRNA sequences with a global geographic spread. The T. equi-derived sequences were evaluated using Bayesian approaches with independent Metropolis-coupled Markov chain Monte Carlo runs. The sequences clustered with those found in Sudan, Croatia, Mongolia, and the US, with statistical support greater than 80% for the two main clades. Hyalomma tick species were found on both donkeys and Grevy's zebras, whereas Rhipicephalus pulchellus was found exclusively on Grevy's zebras and Hyalomma marginatum rupfipes on donkeys. The prevalence of T. equi was 100% in Grevy's zebras and 72% in donkeys with common tick vectors identified. Our results suggest that donkeys and Grevy's zebras can be asymptomatic carriers and that piroplasmosis is endemic in the study area.

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A serological study of Babesia caballi and Theileria equi in Thoroughbreds in Trinidad

Cited by 47 publications

References 8 publications

Investigation of seroprevalence of Theileria equi and Babesia caballi in horses in Nigde province, Turkey

Investigation of seroprevalence of Theileria equi and Babesia caballi in horses in Nigde province, Turkey

A field survey for the seroprevalence of Theileria equi and Babesia caballi in donkeys from Nuu Division, Kenya

PREVALENCE OFTHEILERIA EQUIANDBABESIA CABALLIAS WELL AS THE IDENTIFICATION OF ASSOCIATED TICKS IN SYMPATRIC GREVY'S ZEBRAS (EQUUS GREVYI) AND DONKEYS (EQUUS AFRICANUS ASINUS) IN NORTHERN KENYA

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