Clostridium Enfeksiyonları
Özet
Clostridium cinsi, Gram-pozitif, spor oluşturan anaerobik bakterileri içerir ve birçok patojenik türü ile hayvanlarda ve insanlarda ciddi hastalıklara neden olabilir. Clostridium perfringens, enterotoksik ve histotoksik hastalıklar oluştururken, Clostridium botulinum botulizm, Clostridium tetani ise tetanos hastalığının etkenidir. Clostridium difficile, antibiyotikle ilişkili ishal ve psödomembranöz kolite yol açar. Clostridium türleri genellikle toprak, su ve bağırsak florasında bulunur. Spor oluşturma yetenekleri, bu bakterilerin çevresel faktörlere karşı direnç kazanmasını sağlar. Patojenik türler toksin üretme kapasiteleri ile enfeksiyonlara neden olur. Hastalıklar genellikle ani başlangıçlı olup, ishal, nekrotizan enfeksiyonlar, nörolojik bozukluklar ve septisemi gibi belirtiler gösterir. Tanıda kültür, PCR, toksin analizleri ve histopatolojik incelemeler kullanılır. Tedavide antibiyotikler, antitoksinler ve destekleyici tedaviler uygulanır. Önleyici aşılar, özellikle tetanus ve botulizm için önemlidir. Çevresel kontrol önlemleri ve hijyen, Clostridium enfeksiyonlarının yayılmasını azaltmada etkilidir.
The Clostridium genus includes Gram-positive, spore-forming anaerobic bacteria and can cause serious diseases in animals and humans with many pathogenic species. Clostridium perfringens causes enterotoxic and histotoxic diseases, while Clostridium botulinum causes botulism and Clostridium tetani causes tetanus. Clostridium difficile causes antibiotic-associated diarrhea and pseudomembranous colitis. Clostridium species are usually found in soil, water and intestinal flora. Their ability to form spores allows these bacteria to gain resistance to environmental factors. Pathogenic species cause infections with their toxin-producing capacity. Diseases usually have a sudden onset and show symptoms such as diarrhea, necrotizing infections, neurological disorders and septicemia. Culture, PCR, toxin analyses and histopathological examinations are used in diagnosis. Antibiotics, antitoxins and supportive treatments are applied in treatment. Preventive vaccinations are important, especially for tetanus and botulism. Environmental control measures and hygiene are effective in reducing the spread of Clostridium infections.
Referanslar
Uzal FA, Songer JG, Prescott JF, et al. Clostridial Diseases of Animals, 1e, 1–332. New York: John Wiley & Sons, Inc.; 2016.
Shen A, Edwards AN, Sarker MR, et al. Sporulation and germination in clostridial pathogens. Microbiol. Spectr. 2019; GPP3-0017-2018, https://doi.org/10.1128/microbiolspec
Weese JS. Clostridium (Clostridioides) difficile in animals. J. Vet. Diagn. Investig. 2020; 32 (2): 213–221.
Mehdizadeh Gohari I, Navarro MA, Li J, et al. Pathogenicity and virulence of Clostridium perfringens. Virulence. 2021; 12 (1): 723–753.
Orrell KE, Melnyk RA. Large clostridial toxins: mechanisms and roles in disease. Microbiol. Mol. Biol. Rev. 2021; https://doi.org/10.1128/MMBR.00064-21.
Popoff MR. Bacterial toxins, current perspectives. Toxins (Basel). 2020; 12 (9): 570.
Knapp O, Benz R, Popoff MR. Pore-forming activity of clostridial binary toxins. Biochim. Biophys. Acta. 2016; 1858 (3): 512–525.
Uzal FA, Navarro MA, Li J, et al. Comparative pathogenesis of enteric clostridial infections in humans and animals. Anaerobe. 2018; 53: 11–20.
Revitt-Mills SA, Vidor CJ, Watts TD, et al. (2019). Virulence plasmids of the pathogenic clostridia. Microbiol. Spectr. 2019; GPP3-0034-2018. https://doi.org/10.1128/microbiolspec
Mehdizadeh Gohari I, Unterer S, Whitehead AE, Prescott JF. NetF-producing Clostridium perfringens and its associated diseases in dogs and foals. J. Vet. Diagn. Invest. 2020; 32: 230–238.
Otter A, Uzal FA. Clostridial diseases in farm animals: 1. Enterotoxaemias and other alimentary tract infections. In Pract. 2020; 42 (4): 219–232.
Otter A, Uzal FA. (2020). Clostridial diseases in farm animals: 2. Histotoxic and neurotoxic diseases. In Pract. 2020; 42 (5): 279–288.
Zaragoza NE, Orellana CA, Moonen GA, et al. Vaccine production to protect animals against pathogenic clostridia. Toxins (Basel). 2019; 11 (9): 525.
Fresneda KC, Carvallo Chaigneau FR. Tyzzer’s disease. In: Clostridial Diseases of Animals, 107–116. New Jersey: Wiley, Blackwell; 2016.
Silva ROS, Uzal FA, Oliveira Junior CA, Lobato FCF. (2016). Gas Gangrene (Malignant Edema). In: Clostridial Diseases of Animals, 243–254. New Jersey: Wiley, Blackwell; 2016.
Junior CAO, Silva ROS, Lobato FCF, et al. Gas gangrene in mammals: a review. J. Vet. Diagn. Investig. 2020; 32 (2): 175–183.
Navarro MA, Uzal FA. (2020). Pathobiology and diagnosis of clostridial hepatitis in animals. J. Vet. Diagn. Investig. 2020; 32 (2): 192–202.
Rasetti-Escargueil C, Popoff MR. Antibodies and vaccines against Botulinum toxins: available measures and novel approaches. Toxins (Basel). 2019; 11 (9): 528.
Popoff MR. Tetanus in animals. J. Vet. Diagn. Investig. 2020; 32 (2): 184–191.