Yazar "Aydin, Fatma Esin" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Comparison of milk microbiota between healthy and mastitic cows
    (Tubitak Scientific & Technological Research Council Turkey, 2024) Kizil, Sibel; Aydin, Fatma Esin; Onlen Guneri, Cansu; Ulker, Ufuk; Emekdas, Gurol; Basmaci, Ibrahim; Erat, Serkan
    Mammary gland infections occur due to bacterial changes in the mammary tissue. Studies conducted in recent years have reported variations in the most common bacteria differ according to geographical locations. California mastitis test (CMT), somatic cell count (SCC), and aerobic colony count (ACC) analyses were performed on approximately 50 mL of hygienically collected raw milk samples. Raw milk was also subjected to conventional bacteriological isolation and identification. Bacterial diversity and rates in raw milk were compared through metagenome analysis. Two samples, one from healthy milk and another from subclinical milk with mastitis, were independently tested to determine whether there were differences in the percentages (%) of bacterial phylum and genera detected as a result of metagenome analysis. As a result of the conventional isolation and identification of raw milk, EscherichiaShigella, Acinetobacter, Vibrio, Streptococcus, Pseudomonas, Lactococcus, Glutamicibacter and Bacillus genera, and Enterobacteriaceae family were frequently detected, respectively. As a result of metagenome analysis, the following phyla were detected in healthy raw milk: Firmicutes and Proteobacteria (7/7), Bacteroidota (6/7), and Actinobacteriota (4/7). In raw milk with subclinical mastitis, the detected phyla were Firmicutes and Proteobacteria (27/29), Actinobacteriota (11/29), and Bacteroidota (10/29). As a result of the statistical analysis, the frequency of Bacteriodata in healthy milk samples, as well as Enhydrobacter, Enterobacteriaceae, Paenibacillus, Macrococcus, Spingobacterium, and Others, were significantly higher than the incidence in milk samples with subclinical mastitis. The only exception was observed in Escherichia-Shigella genera, where the opposite situation was evident. As a result of metagenome studies conducted on the raw milk of animals with both healthy and subclinical mastitis, significant differences were detected in some phyla and genera. The findings of our study will shed light on mastitis treatment studies by improving the microbiota.
  • Küçük Resim Yok
    Öğe
    Determination of Subtypes, Serogroups, And Serotypes, Virulence, and/ or Toxigenic Properties of Escherichia coli Isolated From Cattle, Sheep, and Goat Feces by Multiplex PCR
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2024) Kizil, Sibel; Aydin, Fatma Esin; Onel, Aziz Utku; Yildirim, Murat; Gueneri, Cansu Onlen; Cecen, Efsun Melike
    In the study, rectal swabs taken from 300 ruminant animals including cattle (100), sheep (100), and goats (100) were inoculated into Mac Conkey Agar and incubated for 18 h at 37degree celsius. Escherichia coli isolates were confirmed by biochemical tests and the BBL Crystal rapid diagnosis system. O26, O45, O103, O111, O121, O145, and O157 serotypes by PCR test following DNA isolation; ETEC (elt, Stla); EPEC (eaeA,bfpA); STEC (stx1, stx2, eaeA); EHEC (EhlyA); EAEC (CVD432) tested for virulence and/or toxigenic genes. As a result of the isolation studies, 50 E. coli from cattle feces, 92 from sheep feces, and 80 from goat feces were isolated and identified. Apart from the first 5 serotypes frequently seen in studies (O157, O26, O103, O111, and O145), higher rates were found in serogroups such as O45 and O121, and subtypes such as STECs (stx1 and stx2), EPEC (eaeA and bfpA) and EAEC (CVD432) types compared to other studies. The EAEC (CVD432) subtype was found to be very high in this study. It has been determined that serotypes and subtypes detected at high rates in cattle, sheep, and goat feces in our region may cause an increase in the incidence of some critical food-borne infections in humans. Within the framework of the concept of one health, taking the necessary precautions is important for public health.