Journals / İnfeksiyon Dergisi / 2004 / Cilt: 18 - Sayı: 1

Determination of slime production by coagulase-negative staphylococci: Comparison of two methods

Çeşitli klinik örneklerden izole edilen koagülaz-negatif stafilokokların slime üretiminin iki farklı yöntemle karşılaştırmalı olarak incelenmesi

Pages
53–58
Publication Date
2022-10-17
DOI
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AI Summary & Key Takeaways

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

Although there was no important difference for detection of slime formation between the two methods, Congo red agar method was found to be easily applicable, very easily evaluated, yielding rapid results and cost-effective.

📌 3 Key Takeaways

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Objective & Hypothesis:Coagulase-negative staphylococci (CNS), which have been considered as culture contaminants previously, have recently proved to be important pathogens.
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Key Findings & Data:Totally 300 clinical strains of staphylococci isolated from patients visiting the Fırat Medical Center, Fırat University, were investigated.
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Conclusion & Impact:Although there was no important difference for detection of slime formation between the two methods, Congo red agar method was found to be easily applicable, very easily evaluated, yielding rapid results and cost-effective.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Coagulase-negative staphylococci (CNS), which have been considered as culture contaminants previously, have recently proved to be important pathogens. Some CNS have slime factor. Since slime production is more frequent in clinical strains than in skin flora strains, slime factor is considered as a criterium for the pathogenicity of CNS. Additionally, close relationship is found between resistant species and slime factor. The purpose of the study was to compare two different methods (standard tube and Congo red agar) in the determination of slime factor by CNS. Totally 300 clinical strains of staphylococci isolated from patients visiting the Fırat Medical Center, Fırat University, were investigated. The strains were first studied in detail (coagulase, colony formation, hemolysis, catalase, etc..). Of the strains 180 were Staphylococcus aureus (60%) and 120 were CNS (40%). The 120 CNS strains were studied for slime production using standard tube and Congo red agar methods. Slime positivity was 40.8% by Congo red agar and 39.2% by standard tube method. Statistical significance was not observed between these methods (p>0.05). Although there was no important difference for detection of slime formation between the two methods, Congo red agar method was found to be easily applicable, very easily evaluated, yielding rapid results and cost-effective.

Özet

Deri florasında bulunan koagülaz-negatif stafilokoklar (KNS), önceleri kültür kontaminasyonu olarak değerlendirilirken, günümüzde gerçek patojenler olarak önem kazanmaktadırlar. KNS'ların bir bölümü slime faktör oluşturur, infeksiyonlardan etken olarak izole edilen KNS'ların, normal florada bulunanlara göre daha fazla slime faktör oluşturmaları, bu faktörün KNS'lar için bir patojenite kriteri olduğunu göstermektedir. Bu çalışma, slime oluşumunun iki farklı yöntemle karşılaştırmalı olarak incelenmesi (standart tüp ve Kongo kırmızılı agar) ile kliniklerde karşılaşılan önemli bir sorunun açığa kavuşturulması amacıyla yapılmıştır. Fırat Üniversitesi Fırat Tıp Merkezi'nin değişik kliniklerine başvuran hastalardan izole edilen 300 stafilokok susu incelemeye alındı. Ayrıntılı incelenen (koagülaz, koloni yapısı, pigment, hemoliz, katalaz vb.) 300 stafilokok susundan; 180 (%60)'inin Staphylococcus aureus, 120 (%40)'sinin KNS'dan oluştuğu belirlendi, izole edilen 120 KNS'un standart tüp ve Kongo kırmızılı agar yöntemi ile slime oluşturup oluşturmadıkları incelendi. Kongo kırmızılı agar yöntemi ile slime pozitifliği % 40.8, standart tüp yöntemi ile % 39.2 olarak bulundu. İki yöntem arasında istatiksel olarak anlamlı fark yoktu (p>0.05). Slime oluşumunu saptamada Kongo kırmızılı agar ve standart tüp yöntemi arasında anlamlı bir fark olmamasına karşın (p>0.05), Kongo kırmızılı agar yöntemi daha kolay uygulanabilen, çabuk sonuç veren ve çok kolay değerlendirilebilen ekonomik bir test olarak saptanmıştır.

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Cite This Article

ERKMEN, N., ARAL, M., YILMAZ, M. (2022). Determination of slime production by coagulase-negative staphylococci: Comparison of two methods. İnfeksiyon Dergisi, Cilt: 18 - Sayı: 1, 53–58. https://ajindex.com/articles/546033

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