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Pulmonary actinomycosis — Clinical Guidelines

Overview

Actinomycosis is a rare, chronic bacterial infection primarily caused by Actinomyces species, often presenting with non-specific symptoms that can mimic neoplasms or inflammatory conditions, complicating early diagnosis and treatment 1 3 7.

Diagnosis

Clinical Presentation: Recurrent upper respiratory tract infections, tonsillitis, cervicofacial swelling, and systemic symptoms like fever 1 5 7.

Histopathological Examination: Characteristic "sulfur granules" in tissue samples; essential for definitive diagnosis 2 5 9.

Imaging: CT or MRI may show abscesses, fistulae, or granulomatous lesions 3 10.

Culture and Microbiology: Often negative; special media required for accurate identification 3 6.

Incidental Findings: Commonly diagnosed post-tonsillectomy or during surgical explorations for other conditions 2 8.

Management

Antibiotics: High-dose parenteral penicillin (e.g., penicillin G) for prolonged periods (typically weeks to months) 3 13.

Surgical Intervention: Indicated for abscess drainage, removal of necrotic tissue, and correction of fistulae 3 6 13.

Supportive Care: Management of complications such as multiorgan failure and sepsis 3.

Special Populations

Pregnancy: Actinomycosis can be refractory and challenging to treat; close monitoring and prolonged antibiotic therapy are crucial 12.

Elderly and Comorbidities: Increased risk of complications; careful management with multidisciplinary care 7.

Key Recommendations

Early Histopathological Confirmation: Essential for accurate diagnosis due to non-specific clinical features (Evidence: Moderate 2 9).

Prolonged Parenteral Penicillin Therapy: Recommended for treating actinomycosis, especially in severe cases (Evidence: Moderate 3 13).

Surgical Drainage and Debridement: Necessary for abscesses and complications like pericardial tamponade (Evidence: Weak 3 6).

Close Monitoring in Pregnancy: Refractory nature necessitates vigilant management and prolonged antibiotic treatment (Evidence: Expert opinion 12).

References

1 Łanowy P, Sobala-Szczygieł B, Żmudka KJ, Włosowicz A, Jaroszewicz J. Patient with actinomycosis of the cervicofacial and abdominal area, case report. Przeglad epidemiologiczny 2024. link 2 Samaila MO, Sani K, Shofoluwe NA, Rimamskep IY. Incidental histopathological diagnosis of tonsilar actinomycosis: A report of four cases. The Nigerian postgraduate medical journal 2023. link 3 Olds KL, Gilbert JD, Byard RW. Actinomyces in Forensic Practice. The American journal of forensic medicine and pathology 2021. link 4 Bortoluzzi P, Nazzaro G, Giacalone S, Veraldi S. Cervicofacial actinomycosis: a report of 14 patients observed at the Dermatology Unit of the University of Milan, Italy. International journal of dermatology 2020. link 5 Hasan M, Kumar A. Actinomycosis and tonsillar disease. BMJ case reports 2011. link 6 Rasić D, Perić A, Vukomanović-Durdević B. A case of an unilateral tonsillar hypertrophy caused by actinomycosis. Acta medica (Hradec Kralove) 2010. link 7 Samant S, Sandoe J, High A, Makura ZG. Actinomycosis mimicking a tonsillar neoplasm in an elderly diabetic patient. The British journal of oral & maxillofacial surgery 2009. link 8 van Lierop AC, Prescott CA, Sinclair-Smith CC. An investigation of the significance of Actinomycosis in tonsil disease. International journal of pediatric otorhinolaryngology 2007. link 9 Bhargava D, Bhusnurmath B, Sundaram KR, Raman R, Al Okbi HM, Al Abri R et al.. Tonsillar actinomycosis: a clinicopathological study. Acta tropica 2001. link00172-3) 10 Neijens V, van Heerde P, van der Heijden A, Baas P. Actinomycosis, a sheep in wolves' clothes. Lung cancer (Amsterdam, Netherlands) 1996. link00578-8) 11 Hinnie J, Jaques BC, Bell E, Hansell DT, Milroy R. Actinomycosis presenting as carcinoma. Postgraduate medical journal 1995. link 12 Bhatti SA. Cervicofacial actinomycosis in pregnancy. British dental journal 1989. link 13 Goldberg ND, Anthony WC, Yen MC, Hashmi S. Hepatic actinomycosis. Maryland medical journal (Baltimore, Md. : 1985) 1989. link 14 Arfeen S, Boast MT, Large DM. Unilateral thyroid swelling due to actinomycosis. Postgraduate medical journal 1986. link 15 Raju GC, Fung Kee Fung K, Jankey N, Busby G, Naraynsingh V. Actinomycosis of the liver. Tropical and geographical medicine 1985. link 16 Smithers BM, Wall DR, Weedon D. Actinomycosis of the gall bladder. The Australian and New Zealand journal of surgery 1983. link 17 Yoneda K. Subendothelial electron-dense deposits in pulmonary alveolar wall in pulmonary actinomycosis. The American review of respiratory disease 1981. link 18 Drew NC. Genital and pelvic actinomycosis. Case report. British journal of obstetrics and gynaecology 1981. link 19 Schaal KP, Schofield GM, Pulverer G. Taxonomy and clinical significance of Actinomycetaceae and Propionibacteriaceae. Infection 1980. link 20 Crosse JE, Soderdahl DW, Schamber DT. Renal actinomycosis. Urology 1976. link90466-0)

Pulmonary actinomycosis