Seroprevalence and associated risk factors of Chlamydia abortus infection in ewes in Tunisia

Mamlouk, Aymen; Guesmi, Kaouther; Ouertani, Imen; Kalthoum, Sana; Selmi, Rachid; Aicha, Elhem Ben; Mohamed, Bassem Bel Haj; Gharbi, Raja; Monia, Lachtar; Dhaouadi, Anissa; Seghaier, Chedia; Messadi, Lilia

doi:10.1016/j.cimid.2020.101500

Cited by 8 publications

(10 citation statements)

References 32 publications

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“…In the study of Tsakos et al (2001a) in Greece, 82% of the tested flocks and 20% of the tested animals were found seropositive, a finding that resembles that of Iran, where 84% of the flocks and 24% of the animals were tested positive (Esmaeli et al, 2015). In Tunisia, 58% of the flocks and 6.6% of the animals have been tested positive in a recent study (Mamlouk et al, 2020), while in China a much lower percentage (18.65%) of serum samples were positive in a past study (Qin et al, 2014). Surprisingly, the prevalence in Costa-Rica in individual sheep was low (5.4%), without a satisfactory documentation by the authors (Villagra-Blanco et al, 2015).…”

Section: Discussionmentioning

confidence: 94%

“…The disease usually is introduced into the flocks with the entrance of new replacement stock from infected flocks. Moreover, the wild ruminants seem to play an important role in the epidemiology of the disease (Radostits et al, 2007;Qin et al, 2014;Mamlouk et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…For the above reasons, in the present study a specific for C. abortus, according to the manufacturer, ELISA kit has been selected. The last decades, there is a consistent trend for improvement of ELISA in terms of specificity concerning C. abortus detection (Tsakos et al, 2001b;McCauley et al, 2010;Mamlouk et al, 2020). Other serological methods like complement fixation test (CFT) and indirect haemagglutination assay (IHA), are less specific and sensitive than ELISA, but some of them i. e. IHA remains cheaper (Qin et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…It causes abortions at the last month of gestation or delivery of weak lambs or stillbirths (Sargison, 2008). Sometimes there is retained placenta with or without ewe mortality (Mamlouk et al, 2020). Infection in rams can cause orchitis, seminal vesiculitis and infertility (Aitken and Longbottom, 2007;Radostits et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Serological survey of Chlamydia abortus in Greek dairy sheep flocks

Petridou

Kiossis²,

Chochlakis³

et al. 2022

J Hellenic Vet Med Soc

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Chlamydiosis due to Chlamydia abortus is one of the most common causes of abortion in small ruminant flocks worldwide. Although the causative agent is zoonotic, chlamydiosis is not a reportable disease. There is lack of recent data concerning sheep chlamydiosis in Greece.In the current study, a serological investigation for Chlamydia abortus was conducted. Blood samples from 26 randomly selected sheep flocks not vaccinated against chlamydiosis were collected. From each flock, 15 to 20 blood samples were taken from adult female sheep. In total 464 blood samples were examined. One hundred and six samples were positive (22.8%), while 24 samples (5.24%) were doubtful. Moreover, at farm level, in 18 out of the total number of 26 farms, at least one positive animal was detected (69.2%).Chlamydiosis is considered a highly likely cause of sheep abortion in Greece. Therefore, vaccination of the sheep flocks is strongly recommended for the prevention and control of the disease.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Serological survey of Chlamydia abortus in Greek dairy sheep flocks

Petridou

Kiossis²,

Chochlakis³

et al. 2022

J Hellenic Vet Med Soc

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“…abortus (2.0%) in the present study appears to be low, this is contrary to previous findings by Bhandi et al ., [ 19 ] (22%) in Zimbabwe. These differences could be due to differences in target populations, husbandry practices, climatic conditions and methodologies used in each study respectively [ 73 – 75 ]. There is no direct explanation for the low seroprevalence and the source/origin of the C .…”

Section: Discussionmentioning

confidence: 99%

Seroprevalence and assessment of public awareness of Brucella spp., Toxoplasma gondii and Chlamydia abortus in small ruminants from selected smallholder commercial farms of Zimbabwe

Tarusikirwa,

Blacklaws,

Trotter

2023

PLoS ONE

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Brucella spp., Toxoplasma gondii, and Chlamydia abortus have long been recognized as zoonoses and significant causes of reproductive failure in small ruminants globally. A cross-sectional study was conducted in August 2020 to determine the seroprevalences of Brucella spp., Toxoplasma gondii and Chlamydia abortus in 398 small ruminants from four districts of Zimbabwe (Chivi, Makoni, Zvimba, and Goromonzi) using Indirect-ELISAs. A structured questionnaire was used to assess the knowledge, attitudes, and practices of 103 smallholder farmers towards small ruminant abortions, Brucella spp., T. gondii and C. abortus, and to obtain a general overview of the significance of small ruminant reproductive failure(s) on their livelihoods. The overall seroprevalences were: 9.1% (95% CI: 6.4–12.3) for Brucella spp., 6.8% (95% CI: 4.5–9.7) for T. gondii and 2.0% (95% CI: 0.9–3.9) for C. abortus. Location, age, parity, and abortion history were associated with Brucella spp. seropositivity. Location was also associated with both T. gondii and C. abortus seropositivity. The questionnaire survey established that 44% of respondents had recently faced reproductive disease challenges within their flocks, with 34% correctly identifying abortion causes and only 10%, 6% and 4% having specific knowledge of Brucella spp., C. abortus and T. gondii, respectively. This study provides the first serological evidence of Brucella spp. in small ruminants since 1996 and builds the evidence on small ruminant toxoplasmosis and chlamydiosis in Zimbabwe. Evidence of these zoonoses in small ruminants and the paucity of knowledge shows the need for a coordinated One Health approach to increase public awareness of these diseases, and to establish effective surveillance and control measures. Further studies are required to establish the role these diseases play in small ruminant reproductive failure(s), to identify the Brucella spp. detected here to species/subspecies level, and to assess the socio-economic impact of reproductive failure in livestock among marginalised rural communities.

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