What are mycetoma agents?
Table of Contents
What are mycetoma agents?
The etiologic agents of mycetoma are aerobic and anaerobic bacteria (actinomycetoma) and fungi (eumycetoma). In the tissue, these organisms are found in compact aggregates of filamentous bacterial colonies or fungal hyphae, which will characterize the grains.
What are the types of mycetoma?
| Mycetoma | |
|---|---|
| Symptoms | Triad: painless firm skin lump, multiple weeping sinuses, grainy discharge |
| Usual onset | Slowly progressive |
| Types | Actinomycetoma (bacterial) Eumycetoma (fungal) |
| Diagnostic method | Ultrasound, fine needle aspiration |
Is nocardia a mycetoma agent?
More than 56 different species of fungi and bacteria have been reported to cause mycetoma. Nocardia species, especially Nocardia brasiliensis, is the most commonly implicated actinomycetes.
What are the 5 agents of disease?
The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.
What are the two main types of isolation?
Broadly speaking, there are two basic isolating mechanisms:extrinsic and intrinsic. When two populations are separated by a physical barrier, such as a desert, canyon, sea, mountain range or forest, they are being isolated extrinsically, or by external means.
What is the most common bacterial cause of mycetoma?
Mycetoma may be caused by filamentous bacteria (actinomycotic mycetoma or actinomycetoma) or fungi (eumycotic mycetoma or eumycetoma). The most common bacterial causes are Nocardia brasiliensis, Actinomadurae madurae, Streptomyces somaliensis, and Actinomadura pelletieria.
What are the grains in mycetoma?
Etiology
| White Grain | Black Grain |
|---|---|
| Acremonium falciforme | Exophiala jeanselmei |
| Acremonium kiliense | T grisea |
| Acremonium recifei | M mycetomatis |
| Cylindrocarpon destructans | Madurella pseudomycetomatis |
What are the 3 main types of disease causing agents?
The common categories of disease-causing agents include: Viruses. Bacteria. Protozoa.
