Gürkan Akyıldız

Marmara University · Faculty of Health Sciences

Anaplasmosis and ehrlichiosis are important tick-borne rickettsial diseases of medical and veterinary importance that cause economic losses in livestock. In this study, the prevalence of Anaplasma ovis, Ehrlichia canis and Ehrlichia chaffeensis was investigated in ticks collected from sheep in various farms in Van province, which is located in the...

This study was carried out at a vital stopover site of migrating birds in the Turkish Thrace, European part of Turkey, on the Mediterranean/Black Sea Flyway. Ticks were collected from the birds captured in the four migration periods, i.e., autumn 2020, spring 2021, autumn 2021, and spring 2022, and identified morphologically. Throughout the study,...

Cryptosporidium spp. and Giardia duodenalis are protozoan parasites found in humans and many animal species worldwide. The aim of this study was to determine the prevalence and genotypes of Cryptosporidium spp. and Giardia duodenalis in cats and to evaluate the zoonotic potential of these agents. The animal material of the study consisted of a tota...

Cryptosporidium spp., and Giardia duodenalis are intestinal protozoan parasites known to infect humans and various animals and cause diarrhea. This study aimed at determining the prevalence and genotype of Cryptosporidium spp. and Giardia duodenalis in sheep in different locations of Siirt province. The fecal material for this study was collected f...

Giardia duodenalis is a protozoan parasite found in humans and many mammals. This parasite spreads worldwide and is generally recognized as a zoonotic agent and is reported to be one of the most common causes of diarrhea in humans and animals. In this study, it was aimed to determine the prevalence and genotypes of Giardia duodenalis in shelter dog...

Campyloneura virgula is a plant bug found in many parts of the world. While information about the human biting of this insect is available in the literature, this is the first case report of such an incident in Türkiye. The patient was a 44-year-old man who was bitten by Campyloneura virgula in June of 2021. Clinical signs were recorded, and the bi...

Background: Istanbul is one of the world's most densely populated metropolitan cities, with various geographical areas that possess distinct characteristics. These areas have different climates, vegetation, and host populations that can support the survival of diverse tick species. Turkey is a region with a high risk of Crimean-Congo hemorrhagic fe...

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 Diyarb...

Cryptosporidiosis, one of the main protozoan infections of the last century, is especially dangerous for calves and causes significant economic losses. This research was carried out to determine the prevalence of Cryptosporidium spp. by microscopic and molecular methods and to determine subtypes in 100 calves up to 6 months old and with diarrhoea i...

2023. A survey of the prevalence and genotypes of Crypto-sporidium spp. and Giardia duodenalis in shelter dogs in Batman, Turkey. Bulg. J. Vet. Med. (online first). Cryptosporidium spp. and Giardia duodenalis are opportunistic zoonotic protozoan parasites related to diarrhea in humans and many mammals. This study aimed to determine the prevalence a...

Cryptosporidium spp. are one of the most common intestinal protozoan parasites in cats. This parasite can infect a wide range of hosts including humans and domestic animals. This aim of the study was to investigate the prevalence of Cryptosporidium spp. in stray cats of Mardin province, located in the Southeastern Anatolia region of Turkey, using m...

Giardia duodenalis is a common intestinal protozoan parasite that infects domestic and wild mammals, birds, and humans, especially livestock, worldwide. Studies on the prevalence of Giardia duodenalis in calves in Turkey are very limited. The aim of this study was to determine the molecular prevalence and subtype distribution of Giardia duodenalis...

Giardia duodenalis (G. duodenalis) is an important zoonotic protozoan agent that causes foodborne and waterborne diarrhea in humans and other mammals. Molecular-based tests are critical in diagnosing giardiasis in humans and animals, identifying species, understanding the zoonotic potential and transmission routes, and evaluating taxonomy. Therefor...

Aim: Ixodid ticks can transmit Crimean-Congo Hemorrhagic Fever (CCHF), the most important tick-borne disease in Europe, and ABD to humans. The I. ricinus species complex transmits LB, and CCHF is transmitted primarily by Hyalomma spp. ticks. In addition, CCHF virus (CCHFV) was found in different tick species; but their I. ricinus is primarily respo...

Giriş ve Amaç: Kenelerin virüs bulaştırılmasındaki rolü uzun yıllardır bilinmesine rağmen artan hızda yeni kene-kaynaklı virüsler bildirilmektedir. Türkiye, konumu ve kuş göç yolları üzerinde olması nedeniyle vektör-kaynaklı virüslerin yayılması için doğal bir merkez görevi görmektedir. Türkiye'de daha önce yapılan kene metagenomik çalışmalarında k...

Research Article ABSTRACT Keywords: Anopheles Artificial container Culiseta Seasonality Periurban This study was carried out in order to determine the monthly oviposition characteristics of Anopheles maculipennis Meigen sensu lato, Anopheles claviger Meigen sensu stricto, and Culiseta longiareolata Macquart at the artificial containers in a selecte...

Several animal species, including ants, have been reported to be capable of predation on ticks. However, determining factors in most interactions between ticks and predators have not yet been fully deciphered. We hypothesized that the ant species Lasius alienus, which is unknown whether it has any impact on ticks, may exhibit predation on the eggs...

The first etiologically confirmed cases of Crimean-Congo hemorrhagic fever (CCHF) in humans were detected in Turkey in 2002. Since then, thousands of cases have been reported from different parts of the country. Hyalomma (Hy.) marginatum is considered the main vector tick of CCHFe in Turkey, and the primary infection route for humans is known to be...

The one-host biological north form / ecotype of Hyalomma scupense Schulze, 1919 (Acari, Ixodidae) is reported for the first time in Turkey herein. Following the first detection of the tick, a longitudinal field study was carried out to fill gaps in the data concerning its biological features. This study also aimed to determine how the monthly activ...

The poultry red mite (PRM), Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae), is a common and significant ectoparasite of the poultry industry worldwide. Although various biological, chemical, and physical methods have been attempted, an utterly successful control strategy has not been put forward yet. Our experimental investigations and...

Six Anatolian and one European populations of the Myrmeleotettix maculatus species group, which contains M. maculatus and M. ethicus species, have been studied by using molecular genetics methods with mitochondrial COI gene. Myrmeleotettix ethicus is an Anatolian endemic species with local distribution whereas M. maculatus is distributed in western...

Crimean-Congo hemorrhagic fever (CCHF) is a tick-borne viral disease in the old continents, in many countries south of the 50° North Parallel. The agent is known to be the most prevalent and major cause of severe and fatal human hemorrhagic diseases among the tick-borne viruses, and is the second most widespread of all medically critical arboviruse...

Tropical and subtropical regions have seen an alarming increase in vector-borne diseases especially tick-borne diseases. Ehrlichiosis is one of the most important vector-borne disease from a zoonotic perspective and it can be even more lethal in dogs and humans a compromised immune system. This study was conducted to determine the prevalence and mo...

Background: Recent reports have demonstrated the presence of Crimean-Congo hemorrhagic fever virus (CCHFV) genomic material in Hyalomma aegyptium ticks feeding primarily on tortoises belonging to the genus Testudo. This raises the question if these ticks and their hosts play a role in the natural transmission dynamics of CCHFV. However, the studie...

Tetratrichomonas gallinarum is a protozoan parasite of various galliform birds causing a type of enterohepatitis termed tetratrichomoniasis. During the year 2018-2019 an outbreak of unspecified granulomatous diseases, characterized by the sudden deaths of young turkeys were observed in 18 turkey farms in the Van province of Turkey. Three hundred ei...

Background and Aims: Glucocorticoid receptor (GR) has been postulated to serve an important role in normal breast and breast carcinoma. On the other hand, studies on its common polymorphisms with breast cancer are very limited. In this study, we aimed to assess the presence and frequency of 4 common polymorphisms of the GR gene in the cancerous tis...

This study, based on a passive surveillance, has examined 21198 ticks which were detached from a number of people who received hospital consultation and service following the complaints of tick bites between the years of 2006 and 2011 in the city of Istanbul and its vicinity. The ticks have been evaluated in terms of species, developmental stage, g...

Aim: Cryptosporidiosis is a worldwide zoonosis. Microscopic examinations may fail due to indistinctive morphological peculiarities of causative species. Hence, molecular diagnostics has become more important. Methods: Stool samples from 150 patients were examined using carbol-fuchsin stain to determine Cryptosporidium spp. oocysts. Combined nested...

Background: Giardia duodenalis (G. duodenalis) is an ubiquitous, flagellated intestinal protozoan with major public health significance worldwide. Limited data are available on the epidemiology of G. duodenalis in dairy cattle from Turkey. Determining the zoonotic potential of the Giardia infection requires molecular characterization. The aim of th...

The purpose of the present study was to investigate the prevalence and molecular characterization of Giardia duodenalis among dogs in Aydin, Turkey. A total of 473 faecal samples from dogs were collected. The overall prevalence of G. duodenalis was 18.8%. Higher infection rates were observed in dogs younger than three months old, from shelters, and...

The purpose of the present study was to evaluate the effect of chloroquine treatment on cyst excretion in calves naturally infected with Giardia duodenalis. Calves were randomly assigned into two groups based on placebo (group I, n=7 untreated control calves) or treatment (group II, n=7 calves treated orally with 2.5 mg/kg chloroquine twice daily f...

Identification of genetic diversity of Rammeihippus turcicus (Orthoptera: Acrididae: Gomphocerinae) within the framework of detection of National Genetic Resources

Kırklareli’den Toplanan Vektör Kenelerde Kırım Kongo Kanamalı Ateşi Virüsü Yaygınlığının Araştırılması

Dünya genelinde yaygın olarak görülen sivrisinekler, direkt zararlı etkilerinden ve özellikle de son yıllarda önemli hastalıklara neden olan batı nil virüsü ve zika virüsü gibi yüzlerce hastalık etkenine vektörlük yaptıklarından dolayı büyük önem taşırlar. Sivrisineklere ve aracılık ettikleri hastalıklara, dünyanın Antarktika haricindeki bütün kıta...

Çalışmada, bir yıl boyunca Tekirdağ Merkez Devlet Hastanesi Mikrobiyoloji Laboratuvarı’na gaita analizi için sevk edilen hastaların 573’ünden alınan dışkı örnekleri kullanılmıştır. Dışkı durumu ve hastaların klinik verilerine göre seçilen örnekler %2,5’luk potasyum dikromat ile muamele edilmiştir. Crypyosporidium için şüpheli örneklerin ön inceleme...

Kırklareli’nde CCHF Olgularına Rastlanan Köylerdeki İneklerde Kene Enfestasyonunun Mevsimsel Karakteristiği

Trakya’da İneklerde Hyalomma scupense Enfestasyonu ve Enfestasyonun Mevsimsel Karakteristiği

Kene Yumurtaları Üzerinde Kara İzopodlarının Predatör Etkisi

Trakya’nın Kuş Göç Yolu Hattında Sivrisineklerin Mevsimsel Çeşitliliği

Of 18,667 ticks examined, 33 specimens from species identified as Haemaphysalis parva, Hyalomma marginatum, Hy. scupense, Rhipicephalus bursa and Rh. turanicus were found to have external morphological anomalies. Anomalous Ha. parva, Hy. scupence and Rh. turanicus were reported in this study for the first time. General anomalies manifested as asymm...

Periodic sampling with 15-20 days intervals of grazing cattle was conducted in Kirklareli (European part, Trace) and Yozgat (Central Anatolia) provinces. A total of 595 cattle were sampled and 10327 ticks (17.36 tick/cattle, 87.4% infestation) were collected in Kirklareli between April and December 2013. Nine species of ticks were recorded. Tick co...

Rammeihippus Woznessenskij, 1996 (Orthoptera: Acrididae: Gomphocerinae) is a genus represented by two species. Rammeihippus turcicus (Ramme, 1939) is the only known species of the genus from Anatolia. As for most of the Gomphocerinae species in Anatolia, all populations of the species are intermittently distributed at high altitudes. In this study,...

Sivrisinek Ekolojisi ve İlgili Güncel Riskler

Glucocorticoid receptor (GR) belongs to nuclear receptors family and its anti-apoptotic role and expression levels have been shown in breast cancer in various in vitro and in vivo studies. On the other hand, there is only one study available concerning mutations and polymorphisms of GR gene in breast cancer. The aims of this thesis were to determin...

Glukokortikoid reseptör (GR), nükleer reseptörler ailesine aittir ve çeşitli insan kanserlerinin apoptoz mekanizmasında önemli bir rol oynar. Meme kanseri açısından, tümörlerin yaklaşık yarısının resöptör pozitif olduğu gösterilmiştir. Öte yandan, meme kanserinde GR gen polimorfizmlerinin etkilerini ele alan sınırlı sayıda çalışma vardır. Bu çalışm...