Browsing by Author "Ayan, Ozge Oktay"

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Cryptosporidium Spp. in Dogs - Prevalence and Genotype Distribution
(Univ Fed Rio Grande Do Sul, 2023) Celik, Ozgur Yasar; Kochan, Akin; Celik, Burcak Aslan; Ayan, Adnan; Akyildiz, Gurkan; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay
Background: Cryptosporidium spp. is a zoonotic protozoan parasite that affects the gastrointestinal tract of humans and animals. The disease can cause acute and chronic diarrhoea and even death in both humans and animals. In this study, it was aimed to determine the prevalence and genotype distribution of Cryptosporidiosis in shelter dogs in Diyarbakir province located in the Southeastern Anatolia Region of Turkey. Materials, Methods & Results: The animal material of the study consisted of 100 dogs of different breeds and sexes. Faecal samples were collected from the rectum with disposable latex gloves and placed in individual sample containers. All of the samples were examined for Cryptosporidium spp. by Kinyoun Acid Fast and Nested PCR methods. In the Kinyoun Acid Fast staining method, firstly, smear preparations were prepared from fresh faecal samples, fixed in pure methanol for 1 min and allowed to dry. The slides were kept in Kinyoun Carbol-Fuxin for 5 min, dipped in 50% ethyl alcohol, shaken, washed in tap water, kept in 1% sulphuric acid for 2 min and washed in tap water. The slides were kept in methylene blue for 1 min, washed in tap water and allowed to dry. After drying, immersion oil was dripped and examined under a microscope at 100 magnification. DNA extraction was performed from all samples using GeneMATRIX Stool DNA Purification Kit according to the manufacturer's protocol. After Nested PCR analysis was performed. In the PCR step, primers 5'-TTCTAGAGCTAATACATGCG-3' and 5'- CCCATTTCCTTCCTTCGAAACAGGA-3' were used to amplify the 1325 bp gene region. In the nested PCR step, primers 5'- GGAAGGGTTGTATTTATTTATTAGATAAAG-3' and 5'-AAGGAG-TAAGGAACAACCTCCA-3' were used to amplify the 826-864 bp gene region. As a result of both methods, a prevalence of 3% was determined. The infection rate was higher in males (3.57%) than females (2.27%) and in younger than 1 year (5.56%) than in older than 1 year (1.56%). The DNA sequences obtained from the sequence analysis of 3 positive PCR samples were analysed in BioEdit software. A phylogenetic tree was constructed with the data set created by using the 18s rRNA gene sequences obtained from the NCBI genbank database and the DNA sequences obtained as a result of the study, and it was shown which Cryptosporidium species the study samples were related to. Today, many Cryptosporidium species have been identified and most of these species have host adaptation. Although C. canis is the most common species in dogs, C. muris, C. meleagridis, and C. parvum have also been detected. Among these species, C. parvum is recognized as a zoonotic species infecting a wide range of mammals. In this study, DNA sequencing of nested PCR positive samples revealed that 3 samples were zoonotic C. parvum. Discussion: This suggests that dogs may be a reservoir for zoonotic transmission of Cryptosporidium. Consequently, it is recommended that people should be informed about the potential for transmission of this protozoan to humans and animals and that control programmes should be implemented, including the prevention of free entry of stray dogs into public places and homes.
Determination of the Prevalence and Parasite Burden of Coeunurus Cerebralis and Oestrus Ovis in Sheep in Siirt Province of Türkiye
(veterinarni A Farmaceuticka Univerzita Brno, 2025) Kara, Murat; Celik, Burcak Aslan; Celik, Ozgur Yasar; Ayan, Adnan; Selcuk, Muhammed Ahmed; Ercan, Kerem; Ayan, Ozge Oktay
The aim of this study was to determine the prevalence and parasite burdens of Coeunurus cerebralis and Oestrus ovis in sheep in Siirt province, T & uuml;rkiye. Between December 2022 and November 2023, a total of 520 sheep (260 male, 260 female) heads (10 heads per week) were randomly sampled from a butcher. The total prevalence of C. cerebralis was determined to be 12.9%. The prevalence was higher in males, in the Morkaraman breed, in animals younger than two years of age, in dark-coloured ones, in October, and in the right brain hemisphere. The total prevalence of O. ovis was determined to be 38.3%. The prevalence was higher in females, in the Akkaraman breed, in dark-coloured breeds, in age groups older than two years, and in December. In terms of larvae, L1 was detected in 108 sheep, L2 in 106 sheep, and L3 in 139 sheep. A total of 1,039 larvae (278 L1, 321 L2, and 440 L3) were detected. The significant presence of O. ovis found in the sheep in this study indicates that Siirt province has suitable climatic conditions for O. ovis and larval development. It is recommended to include more animals in a future study in order to determine the exact seasonal prevalence of O. ovis infestation in the region, and to use an antiparasitic drug effective against O. ovis in the routine treatment of sheep to reduce the incidence of this disease.
First Report of Zoonotic Cryptosporidium Parvum Subtype Iiaa15g2r1 in Dogs in Türkiye
(Univ Agriculture, Fac veterinary Science, 2024) Ayan, Adnan; Celik, Burcak Aslan; Celik, Ozgur Yasar; Akyildiz, Gurkan; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay; Uslu, Ugur
Cryptosporidium (C.) is an opportunistic protozoan causing gastrointestinal illness in both humans and animals, leading to acute or chronic diarrhea and even death. The study aimed to investigate the prevalence and subtyping of Cryptosporidium spp. in shelter dogs in Van province, T & uuml;rkiye. For microscopic identification of this parasite, a total of 300 fecal samples were collected and stained with Kinyoun's acid-fast method. For molecular analysis, the positive samples were subjected to DNA extraction and SSU rRNA gene of Cryptosporidium spp. was amplified using nested PCR. The microscopic examination revealed a 4.67% prevalence of Cryptosporidium spp. Sequence analysis indicated all samples were positive to C. parvum. In addition, GP60 gene was also amplified and C. parvum subtypes IIaA15G2R1 was confirmed by analyzing the obtained sequences. All the sequences of SSU rRNA and GP60 were deposited in GenBank. To our knowledge, Cryptosporidium parvum subtypes IIaA15G2R1 have been reported first time in dogs in T & uuml;rkiye. It is recommended to implement control strategies by awareness campaign, preventing stray dogs from freely entering public areas, and proper disposal of dog feces.
Molecular Identification of Ehrlichia Canis in Rhipicephalus Sanguineus Ticks From Siirt Province
(Sciendo, 2021) celik, Burcak Aslan; Ayan, Adnan; Yilmaz, Ali Bilgin; celik, Ozgur Yasar; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay
This study was performed on Ehrlichia canis positive ticks collected from dogs to perform sequencing of their 16S rRNA genetic section using the PCR method. The collection of ticks was performed from a total of 60 dogs in the Siirt province, Turkey. A total of 250 ticks were collected and morphologically investigated. All ticks were identified as Rhipicephalus sanguineus sensu lato (s.l). Ehrlichial DNA was detected by the PCR method performed on 38 (15.2 %) of the ticks. The E. canis strains obtained as a result of the sequence analysis were found to be 100% identical to the American Texas (MH620194), Indian (KX766395), and Egyptian (MG564254) strains. This study thereby has identified a zoonotic agent from the R. sanguineus ticks collected from the dogs in the Siirt province.
Molecular Identification of Hepatozoon Canis in Ticks From Dogs in Siirt, Turkey
(Natl information Documentation Centre, 2022) Celik, Burcak Aslan; Ayan, Adnan; Yilmaz, Ali Bilgin; Celik, Ozgur Yasar; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay
HEPATAZOON species are tick borne protozoan parasites classified in the Heptazoidae family, and they are closely related to hemosporinids and piroplasms. In this work, the 18S rRNA genetic section of Hepatozoon canispositive ticks removed from dogs was sequenced using the PCR technique. Ticks were collected from a total of 80 dogs in Siirt, Turkey.A total of 300 collected ticks were morphologically identified to the species level and all ticks identified as Rhipicephalussanguineus (s.l.). H. canis DNA was detected in 12 (%4) out of 300 in R. sanguineusticks by PCR. The phylogenetic tree created via comparison of amplified 18S rRNA region sequences of H. caniswith MT107097.1, MH595911.1, KT215377.1, KT 215376.1, KC 584780.1, KC 584777.1, KC 584775.1, and KC 584774.1. The results obtained will provide important reference material for both veterinary cliniciansand dog owners in terms of managing canine hepatozoonosis.
A Molecular Survey of Hepatozoon Canis in Dogs in the Siirt Province of Turkey
(veterinarni A Farmaceuticka Univerzita Brno, 2022) Celik, Burcak Aslan; Celik, Ozgur Yasar; Ayan, Adnan; Yilmaz, Ali Bilgin; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay
This study aimed to determine Hepatozoon canis prevalence in dogs in the Siirt province of Turkey by the molecular method. The animal material of the study consisted of a total of 75 dogs that appeared clinically healthy. Two ml of blood sample were taken from the vena cephalica antebrachii. Then, DNA extraction was performed. Polymerase chain reaction (PCR) was performed to amplify the 666 bp 18S rRNA gene region of Hepatozoon canis. Two positive PCR products were purified and sequenced. As a result of Nested-PCR, H. canis specific bands in 666 bp size were obtained in 7 (9.33%) out of 75 dogs. The result of sequence analysis, the nucleotide sequence was registered in the NCBI GenBank database with accession numbers OL467380.1-OL467538.1. Hepatozoon canis registered in GenBank of sequence OL467380.1 was found to be similar with other H. canis strains of registration numbers MW684292.1 with 99.69% and MH615006.1-MK091085.1-MF797806.1 with 99.53% rates; and the sequence with registration number OL467538.1 was found to be similar to the series MW684291.1 with 99.09% and MH615006.1-MK091085.1-KX 818220.1 with 99.08% rates by BLAST analysis. Hepatozoon canis prevalence of dogs in the Siirt province was determined as a result of this study. It is of great importance to take preventive measures, especially to fight ticks with appropriate acaricides, since there is no vaccine to prevent the disease.
Prevalence and Subtypes Distribution (St10, St14, St25, St26) of Blastocystis Spp. in Anatolian Water Buffalo (Bubalus Bubalis) in Van, Turkiye
(Wiley, 2024) Ayan, Adnan; Celik, Burcak Aslan; Celik, Ozgur Yasar; Yilmaz, Ali Bilgin; Kilinc, Ozlem Orunc; Ayan, Ozge Oktay
Background: Blastocystis spp. is one of the most common protozoa worldwide, living in the gastrointestinal tract of humans and many other animals. On the basis of the genetic heterogeneity of small subunit ribosomal RNA, at least 28 subtypes (ST1-ST17, ST21 and ST23-ST32) are reported to exist in mammals and birds. ObjectivesThis study was carried out to determine the prevalence and subtypes of Blastocystis spp. in Anatolian buffaloes (Bubalus bubalis) in Van province in the Eastern Anatolia Region of Turkey. Methods: DNA was extracted using commercial GeneMATRIX Stool DNA Purification Kit and then stored at -20 degrees C until PCR amplification. After PCR amplification of the SSU rRNA gene region positive Blastocystis spp., amplicons from buffalo faeces were sequenced and then deposited in GenBank (OR576949.1, OR576950.1, OR576970.1, OR576971.1, OR577019.1, PP837943.1, PP837940.1, PP837939.1, PP837604.1, PP837937.1, PP837934.1, PP837601.1, PP837936.1 and PP837603.1). Results: PCR analysis of 120 faecal samples showed a total prevalence of 11.67% (14/120). The prevalence was higher in females and young animals (p > 0.05). Sequence analysis revealed Blastocystis spp., ST10, ST14, ST25 and ST26 subtypes. To our knowledge, Blastocystis subtypes ST25 and ST26 in buffaloes were reported for the first time in this study. Conclusion: It is thought that more large-scale studies should be carried out to determine the zoonotic subtype potential of this protozoan in the region.