Bordetella Enfeksiyonları
Özet
Bordetella enfeksiyonları, başlıca üç bakteri türünün neden olduğu solunum yolu hastalıklarıdır: B. pertussis, B. parapertussis ve B. bronchiseptica. B. pertussis en önemli insan patojenidir ve boğmacaya (pertussis) neden olur, şiddetli öksürük nöbetleri ve ardından belirgin bir “boğmaca” nefes alımı ile karakterize oldukça bulaşıcı bir solunum yolu hastalığıdır. B. bronchiseptica köpeklerde “Kennel Cough” hastalığına sebep olmaktadır. Bulaşma, öksürme veya hapşırmadan kaynaklanan solunum damlacıkları yoluyla gerçekleşir. 7-10 günlük bir kuluçka döneminden sonra, semptomlar hafif soğuk algınlığı benzeri belirtilerden haftalarca veya aylarca sürebilen paroksismal öksürük nöbetlerine doğru ilerleyerek boğmacaya “100 günlük öksürük” lakabını kazandırır. Boğmaca, apne, pnömoni, nöbetler, ensefalopati ve ciddi vakalarda ölüm gelişebilen 6 aydan küçük bebekler için en büyük riski oluşturur. Ergenler ve yetişkinler tipik olarak daha hafif semptomlar yaşarlar, ancak bulaşma için önemli rezervuarlar olarak hizmet ederler. Teşhis PCR testi veya nazofarengeal örneklerin kültürünü içerir. Tedavi, hastalığın erken döneminde uygulandığında semptom şiddetini azaltabilen makrolid antibiyotikleri içerir. Barınaklarda hijyen tedbirlerinin alınması ve hasta olan hayvanların ayrı olarak tutulması oldukça önemlidir. Son yıllarda, yüksek aşılama oranlarına rağmen birçok gelişmiş ülkede boğmacanın yeniden ortaya çıkması, gelişmiş aşılar ve kontrol stratejilerine yönelik araştırmaların devam etmesine neden olmuştur.
Bordetella infections are respiratory diseases caused mainly by three bacterial species: B. pertussis, B. parapertussis and B. bronchiseptica. B. pertussis is the most important human pathogen. It causes whooping cough (pertussis), a highly contagious respiratory disease characterised by severe coughing followed by a distinctive “whooping cough” breath. B. bronchiseptica causes “Kennel Cough” in dogs. Transmission occurs through respiratory droplets from coughing or sneezing. After an incubation period of 7-10 days, symptoms progress from mild cold-like signs to paroxysmal bouts of coughing that can last for weeks or months, earning pertussis the nickname “100-day cough”. Pertussis poses the most significant risk to infants younger than 6 months, who can develop apnea, pneumonia, seizures, encephalopathy and, in severe cases, death. Adolescents and adults typically experience milder symptoms but serve as important reservoirs for transmission. Diagnosis involves PCR testing or culture of nasopharyngeal samples. Treatment includes macrolide antibiotics, which can reduce symptom severity when administered early in the disease. Hygiene measures in shelters and the segregation of sick animals are essential. In recent years, the re-emergence of whooping cough in many developed countries despite high vaccination rates has led to continued research into improved vaccines and control strategies.
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