Journals / Mikrobiyoloji Bülteni / 2008 / Cilt: 42 - Sayı: 4

Can Chlamydia trachomatis human biovars cause abortion in cattle? An immunohistochemical study on a new host-pathogen relationship

Chlamydia trachomatis’in insan biyotipleri sığırlarda düşük etkeni olabilir mi? Yeni bir konak-patojen ilişkisini araştıran immünohistokimyasal çalışma

Pages
599–605
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Our results have also emphasized that novel routes of transmission should be considered for C. trachomatis infections.

📌 3 Key Takeaways

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Objective & Hypothesis:Chlamydiae, which are obligate intracellular bacterial pathogens, have been radiated from single-celled eukaryotes into multi-celled hosts during their evolution.
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Key Findings & Data:Twenty-three (25.6%) abortion materials which have yielded negative results with these methods for the presence of bacterial agents other than chlamydiae, were further evaluated in terms of the presence of C. trachomatis.
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Conclusion & Impact:Our results have also emphasized that novel routes of transmission should be considered for C. trachomatis infections.
🔬Design:Research Article
📍Scope:23 samples
⚙️Variables:Chlamydia trachomatis · Abort fetüs · Düşük

Abstract

Chlamydiae, which are obligate intracellular bacterial pathogens, have been radiated from single-celled eukaryotes into multi-celled hosts during their evolution. Chlamydia trachomatis one of the important species in this group, is classified into three biovars as a result of their evolution. Two of those biovars, Trachoma and LGV, are pathogens only in humans. Initially, the presence of a high specificity between the host and chlamydiae has been recognized and this relation has been considered as an adaptation mechanism. However, some studies have indicated that chlamydiae can also grow in laboratory animals, yolk sacs of embryonated eggs and in vitro cell cultures. The aim of this study was to investigate if C. trachomatis human specific biovars are possible infectious agents in the aborted bovine fetuses. Ninety aborted bovine fetuses were included in the study, and the bacteria which could be the causative agents for abortion were searched by conventional microbiological methods. Twenty-three (25.6%) abortion materials which have yielded negative results with these methods for the presence of bacterial agents other than chlamydiae, were further evaluated in terms of the presence of C. trachomatis. For this purpose the samples were inoculated into the yolk sac of embryonated eggs and the slides prepared from the yolk sac membranes of embryons died after 24 hours of inoculation, were examined for the presence of inclusion bodies by staining with Giemsa method. The presence of C. trachomatis specific antigens and glycogen inclusions in those 23 samples were also investigated by immunohistochemical and Lugol's iodine staining methods, in the fetal tissue samples which were embedded in paraffin. Immunohistochemical method was performed with immunoperoxidase staining by the use of specific antibodies against C. trachomatis major outer membrane proteins. As a result, 5 (21.7%) of the 23 samples were found positive for C. trachomatis with three of the methods (Giemsa, immunoperoxidase and lugol stainings). Although the data of our study have supported that chlamydiae can adapt to new host species other than humans, further advanced studies are needed on this subject. Our results have also emphasized that novel routes of transmission should be considered for C. trachomatis infections.

Özet

Zorunlu hücre içi bakteriyel patojenler olan klamidyalar, evrimsel gelişimleri sırasında tek hücreli ökaryotik canlılardan çok hücreli ökaryotik canlılara doğru yayılım göstermiştir. Bu grubun en önemli türü olan Chlamydia trachomatis, evrimsel gelişim sonucunda üç biyotipe ayrılmış ve bunlardan iki tanesi (Trachoma ve LGV) sadece insanlar için patojen hale gelmiştir. Başlangıçta klamidyaların yüksek konak özgüllüğü gösterdiği düşünülmüş ve bu durum zaman içerisinde gelişen konak-parazit arasındaki uyumla açıklanmıştır. Ancak bazı araştırmalar, bu bakterilerin laboratuvar hayvanlarında, embriyonlu yumurtada ve in vitro hücre kültürlerinde de üreyebildiğini göstermiştir. Bu çalışmada, insanlar için özgün enfeksiyon etkeni olan C.trachomatis'in atık sığır fetuslarında olası enfeksiyon etkeni olarak araştırılması amaçlanmıştır. Çalışmaya 90 adet atık sığır fetusu alınmış ve öncelikle düşük etkeni olabilecek diğer bakterilerin varlığı geleneksel mikrobiyolojik yöntemlerle araştırılmıştır. Bu yöntemlerle herhangi bir bakteriyel etkenin saptanmadığı 23 (%25.6) örnek klamidya varlığı yönünden incelenmiştir. Bu amaçla, doku örnekleri embriyonlu yumurta sarı kesesine ekilmiş ve ilk 24 saatten sonra ölen embriyonların sarı kese memb-ranından sürme preparatlar hazırlanarak Giemsa boyama ile inklüzyonlar yönünden değerlendirilmiştir. Bu 23 örnekte C.trachomatis'e özgül antijen ve glikojen inklüzyonlarının varlığı, parafine gömülen fetal doku kesitlerinin sırasıyla immünohistokimyasal ve lugol (iyot) boyama yöntemleri ile incelenmesiyle araştırılmıştır, immünohistokimyasal yöntem, C.trachomatis majör dış membran proteinlerine özgül işaretli antikorlar kullanılarak immünoperoksidaz boyama ile gerçekleştirilmiştir. Sonuç olarak, değerlendirilen 23 örneğin beş tanesinde (%21.7) her üç yöntemle de (Giemsa, immünoperoksidaz ve lugol boyama) C.trachomatis pozitifliği saptanmıştır. Çalışmamızın bulguları, C.trachomatis'in insandan başka yeni konak türlerine uyum kazanabileceğini düşündürmekle birlikte, konu ile ilgili daha ileri çalışmalara gerek duyulmaktadır. Bulgularımız ayrıca, C.trachomatis enfeksiyonlarının bulaşında olası yeni enfeksiyon kaynaklarının düşünülmesi gerektiğini de gündeme getirmektedir.

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Cite This Article

ÖZBEK, A., ÖZBEK, E., KALKAN, Y., TEMUR, A., KÜÇÜKKALEM, Ö. F. (2008). Can Chlamydia trachomatis human biovars cause abortion in cattle? An immunohistochemical study on a new host-pathogen relationship. Mikrobiyoloji Bülteni, Cilt: 42 - Sayı: 4, 599–605. https://ajindex.com/articles/298962

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