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    A Preliminary Study to Detect the Presence of Bacteria in Lumbar Disc Herniation

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    Date
    2023-09
    Author
    Aravinth, P
    Withanage, ND
    Pathirage, S
    Athiththan, SP
    Perera, S
    Athiththan, LV
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    Abstract
    Bacterial bio lm in lumbar discs worsens pain by attracting in ammatory cells. Study aims to detect bacteria in herniated discs of patients undergoing lumbar microdiscectomy. Discs (n=23) were collected, into cooked meat media, and brain heart infusion broth for anaerobic and aerobic bacterial isolation respectively. Other portion of the disc was sonicated using a stomacher machineto dislodge the existing bio lm structure and incubated under anaerobic conditions. To rule out contamination skin scrapings and muscle biopsies of the respective patient were processed. Aerotolerance test was performed for positive anaerobic culture. Aerobic subculture was performed in primary culture plates. Gram stain was used to screen, and biochemical identi cation tests were used for presumptive identi cation. Mean age was 44.17 16.63 years where 65.22% were males. All were immunocompetent and had not undergone epidural steroid injections or corticosteroids. Among the positive microbial cultures (n=14), 11 were anaerobic (01 strict anaerobe and 10 facultative anaerobes) with few showing polymicrobial growth(two di erent species). Two discs produced growth in both aerobic and anaerobic cultures whereas one disc was positive for aerobic culture only. The aerobic cultures were identi ed as Acinetobacter spp, Coagulase negative Staphylococcus spp. and Corynebacterium spp. Among the anaerobic positive cultures ve contamination markers showed positive growth , but similar colony morphology generated in disc was not observed. Nine discs had no growth. Culture methods con rm the presence of bacteria in the excised disc. Higher resolution methods will enhance identi cation of speci c bacterial species.
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    http://ir.kdu.ac.lk/handle/345/6800
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    • Allied Health Sciences [70]

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