ArticleTropical animal health and production2016
Seroprevalence and molecular characterization of Chlamydia abortus in frozen fetal and placental tissues of aborting ewes in northeastern Algeria.
Article in Tropical animal health and production, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.
- Abortive diseases and their various associated risk factors in small ruminants in Algeria: a systematic review.Tropical animal health and production · 2021Pooled it
- The Seroprevalence of Chlamydia abortus in Montana Domestic Rangeland Sheep Varies by Breed, Flock and Herding Practices.Veterinary medicine and science · 2026Article
- Assessment of seroprevalence and associated risk factors ofOpen veterinary journal · 2025Article
- A review of zoonotic chlamydiae species in Africa: assessing their burden and potential impact through One Health perspective.One health outlook · 2025Review
- Article
- Prospective cohort study reveals unexpected aetiologies of livestock abortion in northern Tanzania.Scientific reports · 2022Article
- Recent advances and public health implications for environmental exposure to Chlamydia abortus: from enzootic to zoonotic disease.Veterinary research · 2022Review
- Seroprevalence and Risk Factors Associated withPathogens (Basel, Switzerland) · 2021Article
- Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Enzootic abortion of ewes is one of the most serious health problems in sheep flocks worldwide. It has a significant economic impact because abortion, decrease in milk production and weak lambs. Besides, the bacteria is zoonotic. A cross-sectional study was conducted to determine the seroprevalence and risk factors associated with Chlamydia abortus infection in 552 ewes in Constantine using a C. abortus-specific indirect ELISA kit. Chlamydial DNA was investigated in ten ovine fetuses and eight placentas using PCR- restriction fragment length polymorphism (RFLP) and DNA sequencing. The study concluded that 7.2 % of ewes were seropositive and 33.3 % of sheep flocks had at least one seropositive ewe. Adjacent farmworker visits (OR = 7.667, 95 % CI (OR) = 2.307; 27.203) was defined as a risk factor. Deliveries of weak lambs (OR = 2.920, 95 % CI (OR) = 1.022; 8.342) and septicemia in lambs (OR = 9.971, 95 % CI (OR) = 2.383; 41.713) were significantly associated with chlamydial infection. PCR-RFLP analysis revealed positive signals to C. abortus in six fetuses and four placentas. Sequencing of the omp2 gene revealed that the Algerian strain is 96 % similar with C. abortus FAS strain. C. abortus plays a major role in abortion in northeastern Algeria. Appropriate control measures must be implemented to reduce economic losses and to avoid human contamination.
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Registered trials
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