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    Discovery of a new Hepatozoon species namely Hepatozoon viperoi sp. nov. in nose-horned vipers in Turkiye
    (Nature Portfolio, 2023) Ceylan, Onur; Ungari, Leticia Pereira; Soenmez, Gonca; Gul, Cigdem; Ceylan, Ceylan; Tosunoglu, Murat; Baycan, Bengi
    Although Hepatozoon spp. remains the most prevalent intracellular protozoa infecting snakes, it was reported only in a few snake species of the Colubridae family in Turkiye. Moreover, studies on these hemoparasites are not available in venomous nose-horned vipers from Turkiye. In this study, we investigated Hepatozoon spp. in three individual Vipera ammodytes using morphological and molecular methods. Our results were positive for intraerythrocytic Hepatozoon spp. gamonts in all three snakes, exhibiting low parasitemia. The microscopic findings were further confirmed through molecular data. A genus-specific PCR assay targeting the 18S rRNA gene region of Hepatozoon spp., was performed using HemoF/HemoR and Hep300/Hep900 primers. The obtained sequences were concatenated and used in phylogenetic analyses in comparison with different Hepatozoon species. Although our (OP377741) isolate was separated into a different branch, it was clustered with the isolates of H. massardi (KC342526), H. cevapii (KC342525), and H. annulatum (ON262426) from Brazilian snakes. Moreover, gene similarity and pair-wise distance between our isolate and other Hepatozoon species infecting snakes were found to be 89.30-98.63% and 0.009-0.077, respectively. Hence, we reported a new species of Hepatozoon, namely Hepatozoon viperoi sp. nov. infecting V. ammodytes. Since the literature does not indicate the existence of such a Hepatozoon species in V. ammodytes in different countries, our data may contribute to the expanding knowledge of Hepatozoon species in snakes, providing new insights into the biodiversity of the haemogregarine protozoan parasite.
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    Evaluation of endothelial glycocalyx injury biomarkers in feline hemotropic mycoplasmosis
    (Nature Portfolio, 2024) Ider, Merve; Ceylan, Ceylan; Naseri, Amir; Ceylan, Onur; Durgut, Murat Kaan; Ok, Mahmut; Iyigun, Suleyman Serhat
    The present study aimed to investigate endothelial glycocalyx (eGCx) damage in cats with feline hemotropic mycoplasmosis caused by Mycoplasma haemofelis using selected biomarkers and to determine the diagnostic and prognostic significance of these biomarkers. The study included 25 cats with feline hemotropic mycoplasmosis and 10 healthy cats. Clinical examination, blood gas analysis, complete blood count, and biochemical analysis were performed. Hemotropic mycoplasmosis diagnosed by microscopic examination and molecularly confirmed by PCR targeting the Mycoplasma haemofelis 16s rRNA gene. To evaluate endothelial glycocalyx damage, syndecan-1, endothelin-1 (ET-1), asymmetric dimethylarginine (ADMA), and vascular endothelial growth factor-A (VEGF-A) concentrations were measured using cat-specific commercial ELISA kits. Of the cats with feline hemotropic mycoplasmosis, 14 (56%) survived and 11 (44%) died. While syndecan-1 and ET-1 concentrations were significantly higher in cats with hemotropic mycoplasmosis compared to the control group (p < 0.001), no statistically significant difference was found for ADMA and VEGF-A concentrations (p > 0.05). Endothelial glycocalyx biomarkers showed significant correlations with each other and with hematological parameters (p < 0.01). The results of the ROC analysis showed that ET-1 with area under the curve (AUC) of 0.821 (p < 0.01) and VEGF-A with AUC of 0.805 (p < 0.010) were found to be significant prognostic indicators. In conclusion, this study demonstrated that serum syndecan-1 and ET-1 can be used as diagnostic and serum ET-1 and VEGF-A as prognostic biomarkers in cats with hemotropic mycoplasmosis. Our results indicate the development of eGCx damage in feline hemotropic mycoplasmosis and suggest that glycocalyx disruption may contribute to the pathogenesis of the disease.
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    Feline vector-borne haemopathogens in Turkiye: the first molecular detection of Mycoplasma wenyonii and ongoing Babesia ovis DNA presence in unspecific hosts
    (Bmc, 2024) Ceylan, Onur; Ma, Zhuowei; Ceylan, Ceylan; Ider, Merve; Evci, Ayse; Mavinehir, Abdullah; Xuan, Xuenan
    Background Cats are hosts and reservoirs for many haemopathogens such as piroplasms, Rickettsia, hemotropic Mycoplasma, Bartonella, Ehrlichia, and Anaplasma, which are transmitted by various vector arthropods and some of which have a zoonotic concern. Although it is noteworthy that the rate of ownership of companion animals has increased in Turkiye in recent years and that cats account for a large proportion of these animals, there is limited research on the vector-borne infectious agents carried by them. The present study aimed to provide a comprehensive molecular epidemiological data and molecular characterization of feline vector-borne haemopathogens (FVBHs), including piroplasms, anaplasmataceae, rickettsias, haemoplasmas, and Bartonella species in Turkiye. In total, 250 feline blood samples were collected from client-owned cats (n = 203) and shelter cats (n = 47) brought to the Small Animal Hospital of Selcuk University, Veterinary Faculty. Results Overall, 40 (16%) cats were found to be infected with at least one of the investigated haemopathogens and piroplasm, Mycoplasma spp. and Bartonella spp. prevalence was 1.6%, 11.2%, and 4.8%, respectively. No Anaplasma/Ehrlichia spp. and Rickettsia spp. DNA was detected in the investigated feline samples. Sequence analysis revealed that all four piroplasms belonged to Babesia ovis with a 97.93-99.82% nucleotide sequence identity to 18S rRNA gene sequences from Spain and Turkiye, while some sequenced hemoplasmas were Mycoplasma haemofelis (Mhf), Candidatus Mycoplasma haemominutum (CMhm) and Mycoplasma wenyonii, and Bartonella spp. were Bartonella henselae and Bartonella koehlerae species. Co-infections with Mycoplasma spp. and Bartonella spp. were also detected in 4 cats (1.6%) in this study, where single infections were predominant. Conclusion This study provides valuable information on zoonotically important feline vector-borne hemopathogens in Turkiye, some of which have received attention under the One Health perspective, and is the first molecular epidemiological study to demonstrate the presence of Babesia ovis, the causative agent of ovine babesiosis, and Mycoplasma wenyonii DNA, the causative agent of bovine haemotropic mycoplasmosis, in cats. Further studies on the roles of such pathogens detected in unspecific hosts and the host specificity of the vectors that transmit them will contribute to the elucidation of this situation.
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    Serostatus of Small Ruminant Toxoplasmosis and Neosporosis Throughout the Southeastern Anatolia Region of Türkiye
    (Univ Agriculture, Fac Veterinary Science, 2024) Ceylan, Ceylan; Sevinc, Ferda; Ceylan, Onur
    Toxoplasma (T.) gondii and Neospora (N.) caninum are two significant abortifacient apicomplexan protozoa causing severe economic losses in livestock farming. This study was designed to investigate the serological status of T. gondii and N. caninum in sheep and goats across the Southeastern Anatolia Region of T & uuml;rkiye, including some provinces bordering Syria and Iraq. Totally, 906 serum samples collected from female sheep (n=510) and goats (n=396) were investigated for specific antibodies against these protozoa by recombinant TgSAG2 and NcSAG1 protein-based indirect ELISA (iELISA). The individual seroprevalence of T. gondii and N. caninum in sheep was determined as 32.6 and 3.1%, respectively, while the seroprevalence of infection with both species was 33.1%. On the other hand, T. gondii and N. caninum seroprevalence in goats were 32.1 and 20.2%, respectively, while the total seroprevalence of infection with both species was 39.4%. The highest seroprevalence values for T. gondii (P0.05) were determined in sheep from Diyarbak & imath;r and Mardin provinces, respectively, while in goats, higher seroprevalence values for both protozoa were determined in Diyarbak & imath;r province compared to other provinces (P0.05) and when seroprevalence values between animal species were compared, caprine neosporosis was statistically significantly higher (P<0.05). The fact that 35.9% of the small ruminants enrolled in the study had been exposed to abortive apicomplexan protozoa during their lives is a serious concern, given the zoonotic aspects of these protozoa and the economic damage they can cause.
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    Wide bovine tick-borne pathogen spectrum: Predominancy of Theileria annulata and the first molecular detection of Ehrlichia minasensis in Turkey
    (Springer, 2024) Ceylan, Onur; Ma, Zhuowei; Ceylan, Ceylan; Culha, Muhammed Hudai; Galon, Eloiza May; Ji, Shengwei; Li, Hang
    Vector-borne diseases indulge in severe economic losses in the livestock industry by adversely affecting cattle breeding in tropical and subtropical zone countries, including Turkey, encompassing a wide land area representing diverse climatic conditions. This study aimed to investigate significant bovine tick-borne piroplasm, rickettsia, and some other bacterial agents by genus- or species-specific PCR and nested PCR techniques in Turkey. A total of 210 cattle blood samples were collected from sixteen provinces in different geographical regions of Turkey. PCR analyses were performed targeting the detection of Babesia/Theileria/Hepatozoon sp. 18S rRNA, Babesia/Theileria sp. 18S rRNA (V4), B. bigemina RAP-1a, B. bovis SBP-4, B. ovata AMA-1, B. naoaki AMA-1, T. annulata Tams-1, T. orientalis MPSP, T. mutans 18S rRNA, Anaplasma/Ehrlichia sp. 16S rRNA, A. marginale MSP4, A. bovis 16S rRNA, A. phagocytophilum 16S rRNA, A. capra 16S rRNA, E. ruminantium pSC20, Mycoplasma sp. 16S rRNA, and Coxiella burnetii 16S rRNA genes. Overall, 133 (63.3%) cattle were found to be infected with at least one of the following protozoan or bacterial pathogens; B. bovis, B. bigemina, B. occultans, T. annulata, T. orientalis, A. marginale, A. phagocytophilum, and Mycoplasma sp. The total prevalence of pathogens was determined as follows; 0.5% B. bovis, 0.5% B. bigemina, 1.4% B. occultans, 41.0% T. annulata, 1.4% T. orientalis, 10.5% A. marginale, 13.8% A. phagocytophilum, 0.5% A. bovis, 2.9% Uncultured Anaplasma sp., 0.5% E. minasensis, 0.5% Uncultured Ehrlichia sp., and 23.3% Mycoplasma sp. Moreover, large part of the total infection (n:133) was composed of single infections (63.9%); however, double (24.8%), triple (7.5%), quadruple (2.3%), and quintuple (1.5%) co-infections were also encountered. In addition to some bovine pathogens such as B. occultans, T. orientalis, A. bovis, M. wenyonii, and Candidatus Mycoplasma haemobos, which were rarely reported in Turkey, sequencing and phylogenetic analysis revealed the first detection of Uncultured Ehrlichia sp. (0.5%), and E. minasensis (0.5%) with 100% nucleotide sequence identities. The study also indicates that the spectrum of pathogens harbored by Turkish cattle is quite wide, and these pathogens cause multiple co-infections with various combinations, and T. annulata stands out as the primary bovine pathogen among them.