Bacteriology of pyodermas and antibiograms of pathogens
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Abstract:
One hundred and seventy six cases of various clinical types of pyodermas were investigated to find the causative organism of the disease. Folliculitis formed the largest clinical group followed by infectious eczematoid dermatitis, secondary infection, furuncles, impetigo, ecthyma and carbuncle in descending order of frequency. A total of 189 micro-organisms were isolated from the specimens examined. A single infecting organism was isolated from 74.43% and more than one type of organism from 16.48% of cases. Coagulase positive staphylococcus (73.02%) was the predominant species followed by beta-haemolytic streptococcus (26.98%). Coagulase positive staphylococcus was isolated from 109 (61.93%), beta-haemolytic streptococcus from 22 (12.5%) and both these organisms from 29 (16.48%) cases. The antibiotic resistance pattern showed maximum resistance to penicillin followed by ampicillin. None of the strain was found to be resistant to kanamycin. Low percentage of strains were found to be resistant to streptomycin, oxytetracycline, trimethoprim, cloxacillin, erythromycin, chloramphenicol, cephalexin, gentamycin and neomycin.
Insights
This study investigated 176 pyoderma cases, identifying coagulase-positive staphylococcus as the most common cause. Most strains showed resistance to penicillin and ampicillin but remained sensitive to kanamycin.
Area of Science:
- Dermatology
- Microbiology
- Infectious Diseases
Background:
- Pyodermas are common bacterial skin infections.
- Identifying causative organisms is crucial for effective treatment.
Purpose of the Study:
- To investigate the causative organisms of various clinical types of pyodermas.
- To determine the antibiotic resistance patterns of isolated microorganisms.
Main Methods:
- Investigated 176 cases of clinical pyodermas.
- Isolated and identified microorganisms from clinical specimens.
- Assessed antibiotic susceptibility of the isolated strains.
Main Results:
- Folliculitis was the most frequent clinical type.
- Coagulase-positive staphylococcus (73.02%) was the predominant isolate, followed by beta-haemolytic streptococcus (26.98%).
- Maximum antibiotic resistance was observed against penicillin and ampicillin; kanamycin showed no resistance.
Conclusions:
- Coagulase-positive staphylococcus is a primary cause of pyoderma.
- Antibiotic resistance patterns highlight the need for judicious antibiotic selection.
- Kanamycin appears to be a reliable treatment option against these pyoderma-causing organisms.