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  1. Article: Larval Therapy and Larval Excretions/Secretions: A Potential Treatment for Biofilm in Chronic Wounds? A Systematic Review.

    Morris, Daniel / Flores, Micah / Harris, Llinos / Gammon, John / Nigam, Yamni

    Microorganisms

    2023  Volume 11, Issue 2

    Abstract: Chronic wounds present a global healthcare challenge and are increasing in prevalence, with bacterial biofilms being the primary roadblock to healing in most cases. A systematic review of the to-date knowledge on larval therapy's interaction with chronic- ...

    Abstract Chronic wounds present a global healthcare challenge and are increasing in prevalence, with bacterial biofilms being the primary roadblock to healing in most cases. A systematic review of the to-date knowledge on larval therapy's interaction with chronic-wound biofilm is presented here. The findings detail how larval therapy-the controlled application of necrophagous blowfly larvae-acts on biofilms produced by chronic-wound-relevant bacteria through their principle pharmacological mode of action: the secretion and excretion of biologically active substances into the wound bed. A total of 12 inclusion-criteria-meeting publications were identified following the application of a PRISMA-guided methodology for a systematic review. The findings of these publications were qualitatively analyzed to provide a summary of the prevailing understanding of larval therapy's effects on bacterial biofilm. A further review assessed the quality of the existing evidence to identify knowledge gaps and suggest ways these may be bridged. In summary, larval therapy has a seemingly unarguable ability to inhibit and degrade bacterial biofilms associated with impaired wound healing. However, further research is needed to clarify and standardize the methodological approach in this area of investigation. Such research may lead to the clinical application of larval therapy or derivative treatments for the management of chronic-wound biofilms and improve patient healing outcomes at a time when alternative therapies are desperately needed.
    Language English
    Publishing date 2023-02-11
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms11020457
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: An exploration of public perceptions and attitudes towards maggot therapy.

    Nigam, Yamni / Williams, Sharon / Humphreys, Ioan / Clifford, Rebecca / Brown, Amy

    Journal of wound care

    2022  Volume 31, Issue 9, Page(s) 756–770

    Abstract: Objective: The aim of the study was to explore public opinion and perceptions of maggot therapy (larval therapy), a treatment option for hard-to-heal wounds.: Method: The study used a mixed-method approach to obtain quantitative and qualitative data. ...

    Abstract Objective: The aim of the study was to explore public opinion and perceptions of maggot therapy (larval therapy), a treatment option for hard-to-heal wounds.
    Method: The study used a mixed-method approach to obtain quantitative and qualitative data. A focus group was convened to explore opinions and views of maggot therapy with a small group of members of the public. Analysis of emerging themes from the focus group was used to design an anonymised web-based survey, which was made available online to members of the public through email and social media.
    Results: The focus group participants identified four key themes concerning the acceptability of maggot therapy. The subsequent online survey was completed by 412 participants, analysis of which revealed some worries and fears. Only 36% of survey participants agreed that they would accept maggot therapy as a first choice for a hypothetical painful wound, although this number increased with wound severity. The most predominant concerns regarding maggot therapy were sensation and a feeling of disgust associated with the therapy. However, participants could see some benefits to maggot therapy.
    Conclusion: Our study showed that public perception of maggot therapy is varied. Survey participants expressed worries and fears associated with its use. However, positive relationships existed between knowledge scores and potential acceptability of maggot therapy, suggesting that information dissemination and education may be an important factor in public perception and acceptability of maggot therapy.
    MeSH term(s) Animals ; Attitude ; Debridement/methods ; Humans ; Larva ; Public Opinion ; Wound Healing
    Language English
    Publishing date 2022-09-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 1353951-6
    ISSN 0969-0700
    ISSN 0969-0700
    DOI 10.12968/jowc.2022.31.9.756
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Evaluating nursing opinion and perception of maggot therapy for hard-to-heal wound management.

    Hopkins, Ruth Cn / Williams, Sharon / Brown, Amy / Humphreys, Ioan / Clifford, Rebecca / Nigam, Yamni

    Journal of wound care

    2022  Volume 31, Issue 10, Page(s) 846–863

    Abstract: Objective: Maggot therapy (MT) or larval debridement therapy is a recognised, effective but underutilised treatment for the management of hard-to-heal wounds and infected ulcers. It is available on NHS prescription in the UK, where wound management is ... ...

    Abstract Objective: Maggot therapy (MT) or larval debridement therapy is a recognised, effective but underutilised treatment for the management of hard-to-heal wounds and infected ulcers. It is available on NHS prescription in the UK, where wound management is predominantly nurse-led. Anecdotal reports and published literature suggest that nurses may be reluctant to utilise the therapy. The aim of this study was to evaluate the feelings and opinions of nurses regarding the use of MT.
    Method: The first stage of this mixed-methods study was a focus group held to discuss MT and opinions of specialist nurse clinicians. Next, an anonymised web-based online survey was launched through the
    Results: Awareness of MT among all nurses was extremely high. A breakdown of results showed that MT was much more highly regarded by wound specialist nurses than non-wound specialist nurses. The latter exhibited a greater level of reluctance to administer the therapy, with almost one-third of these nurses surveyed saying they found maggots disgusting and that the idea of MT made their skin crawl. In-depth interviews revealed that a lack of knowledge about MT was a prime concern.
    Conclusion: Wound specialist nurses are more likely to embrace MT than non-wound nurse specialists, who report a varying degree of wariness to MT. Our study highlights a need for better education and training in MT for all nurses, to address issues with acceptance and willingness to treat or help treat patients with hard-to-heal wounds which are suitable for MT.
    MeSH term(s) Animals ; Debridement/methods ; Dermatologic Surgical Procedures ; Humans ; Larva ; Perception ; Wound Healing
    Language English
    Publishing date 2022-09-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 1353951-6
    ISSN 0969-0700
    ISSN 0969-0700
    DOI 10.12968/jowc.2022.31.10.846
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Synthesis and In Vitro Antimicrobial SAR of Benzyl and Phenyl Guanidine and Aminoguanidine Hydrazone Derivatives

    Wolfgang Dohle / Xiangdong Su / Yamni Nigam / Edward Dudley / Barry V. L. Potter

    Molecules, Vol 28, Iss 1, p

    2022  Volume 5

    Abstract: A series of benzyl, phenyl guanidine, and aminoguandine hydrazone derivatives was designed and in vitro antibacterial activities against two different bacterial strains ( Staphylococcus aureus and Escherichia coli ) were determined. Several compounds ... ...

    Abstract A series of benzyl, phenyl guanidine, and aminoguandine hydrazone derivatives was designed and in vitro antibacterial activities against two different bacterial strains ( Staphylococcus aureus and Escherichia coli ) were determined. Several compounds showed potent inhibitory activity against the bacterial strains evaluated, with minimal inhibitory concentration (MIC) values in the low µg/mL range. Of all guanidine derivatives, 3-[2-chloro-3-(trifluoromethyl)]-benzyloxy derivative 9m showed the best potency with MICs of 0.5 µg/mL ( S. aureus ) and 1 µg/mL ( E. coli ), respectively. Several aminoguanidine hydrazone derivatives also showed good overall activity. Compounds 10a , 10j , and 10r – s displayed MICs of 4 µg/mL against both S. aureus and E. coli . In the aminoguanidine hydrazone series, 3-(4-trifluoromethyl)-benzyloxy derivative 10d showed the best potency against S. aureus (MIC 1 µg/mL) but was far less active against E. coli (MIC 16 µg/mL). Compound 9m and the para -substituted derivative 9v also showed promising results against two strains of methicillin-resistant Staphylococcus aureus (MRSA). These results provide new and potent structural leads for further antibiotic optimisation strategies.
    Keywords benzyl guanidine ; benzyl aminoguanidine hydrazone ; guanylation ; antimicrobial activity ; methicillin-resistant Staphylococcus aureus (MRSA) ; Organic chemistry ; QD241-441
    Subject code 540
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: What is the optimal treatment time for larval therapy? A study on incubation time and tissue debridement by bagged maggots of the greenbottle fly, Lucilia sericata.

    Wilson, Michael R / Nigam, Yamni / Knight, John / Pritchard, David I

    International wound journal

    2018  Volume 16, Issue 1, Page(s) 219–225

    Abstract: The effective use of larvae of the greenbottle fly, Lucilia sericata, in wound debridement requires a working knowledge of how feeding changes over time. Using a laboratory assay and bagged larval dressings, the effect of incubation time on larval ... ...

    Abstract The effective use of larvae of the greenbottle fly, Lucilia sericata, in wound debridement requires a working knowledge of how feeding changes over time. Using a laboratory assay and bagged larval dressings, the effect of incubation time on larval feeding rates and body mass was investigated for up to 120 hours at 32°C. The mass of tissue digested increased significantly in incremental 24-hour periods up to 72 hours, with no significant consumption occurring afterwards. Larval mass increased only up to 48 hours. A further test comparing the efficacy of a single 96-hour application of larvae against two consecutive 48-hour applications found that the mass of tissue digested in the latter was 14.3% higher than the former, a difference that was statistically significant. Current clinical guidance suggests a 4-day application period for bagged larvae. Based on these results, an incubation time of 72 hours (3 days) for bagged larvae would be the most effective at the study temperature. However, it is acknowledged that wound temperature can vary, whereby feeding rates would likely differ. In view of this, we conclude that a period of 3 to 4 days is optimum for the application of larvae, and current guidelines should be adhered to.
    MeSH term(s) Animals ; Debridement/methods ; Diptera/growth & development ; Feeding Behavior/physiology ; Humans ; Larva/growth & development ; Time Factors ; Wound Healing/physiology
    Language English
    Publishing date 2018-10-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 2170920-8
    ISSN 1742-481X ; 1742-4801
    ISSN (online) 1742-481X
    ISSN 1742-4801
    DOI 10.1111/iwj.13015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Physiological changes associated with aging and immobility.

    Nigam, Yamni / Knight, John / Bhattacharya, Sharmila / Bayer, Antony

    Journal of aging research

    2012  Volume 2012, Page(s) 468469

    Language English
    Publishing date 2012-05-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2573906-2
    ISSN 2090-2212 ; 2090-2212
    ISSN (online) 2090-2212
    ISSN 2090-2212
    DOI 10.1155/2012/468469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Naturally derived factors and their role in the promotion of angiogenesis for the healing of chronic wounds.

    Morgan, Claire / Nigam, Yamni

    Angiogenesis

    2013  Volume 16, Issue 3, Page(s) 493–502

    Abstract: Chronic diseases such as vascular disease and diabetes are witnessing a global increase in prevalence. Such diseases often predispose patients to the development of severe, debilitating, chronic wounds. Angiogenesis, the formation of new capillaries from ...

    Abstract Chronic diseases such as vascular disease and diabetes are witnessing a global increase in prevalence. Such diseases often predispose patients to the development of severe, debilitating, chronic wounds. Angiogenesis, the formation of new capillaries from the pre-existing vascular network, is an essential component of wound healing and aberrant angiogenesis is evident in almost all chronic wounds. Natural products, derived from both plants and animals, provide a significant haven of compounds which have proved to be of great benefit to man and his ailments. Whilst significant advances have been made in the understanding of impaired angiogenesis in a non-healing wound, in the clinical setting, few effective agents exist that can expedite wound healing and closure. The lack of effective healing agents has led to a renewed interest in investigations into natural wound healing resources. In this review, we collate new evidence that details the potential for several natural compounds to promote angiogenesis and wound healing, most predominately via the up regulation of VEGF expression, that warrant urgent further investigation for development into new pro-angiogenic/wound healing therapies.
    MeSH term(s) Angiogenesis Inducing Agents/pharmacology ; Animals ; Biological Products/pharmacology ; Chronic Disease/drug therapy ; Humans ; Insecta ; Intercellular Signaling Peptides and Proteins/pharmacology ; Larva/metabolism ; Larva/physiology ; Models, Biological ; Neovascularization, Physiologic/drug effects ; Neovascularization, Physiologic/physiology ; Phenols/pharmacology ; Plant Extracts/pharmacology ; Wound Healing/physiology
    Chemical Substances Angiogenesis Inducing Agents ; Biological Products ; Intercellular Signaling Peptides and Proteins ; Phenols ; Plant Extracts
    Language English
    Publishing date 2013-07
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 1484717-6
    ISSN 1573-7209 ; 0969-6970
    ISSN (online) 1573-7209
    ISSN 0969-6970
    DOI 10.1007/s10456-013-9341-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Detection and partial characterization of antifungal bioactivity from the secretions of the medicinal maggot, Lucilia sericata.

    Evans, Rhys / Dudley, Ed / Nigam, Yamni

    Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society

    2015  Volume 23, Issue 3, Page(s) 361–368

    Abstract: The antibacterial properties of the excretions/secretions (ES) of the medicinal maggot, Lucilia sericata have long been known and the effectiveness of maggot debridement therapy in relation to the clearance of bacteria from the surface of wounds has been ...

    Abstract The antibacterial properties of the excretions/secretions (ES) of the medicinal maggot, Lucilia sericata have long been known and the effectiveness of maggot debridement therapy in relation to the clearance of bacteria from the surface of wounds has been the source of much research over recent years. Less well known, however, are the antifungal properties of L. sericata ES. Here, we show by means of the colony forming unit assay and optical density assays, that L. sericata native ES possess significant antifungal properties and appears to possess a highly heat stable, freeze/thaw, and lyophilization resistant antifungal component. We also show that the antifungal activity present in the native ES consists of a number of antifungal components present in three fraction masses consisting of >10, 10-0.5, and <0.5 kDa, with the greatest level of activity being seen in the <0.5 kDa fraction.
    MeSH term(s) Animals ; Antifungal Agents/pharmacology ; Aspergillosis/therapy ; Bodily Secretions/chemistry ; Candidiasis/therapy ; Chronic Disease ; Debridement/methods ; Diptera/chemistry ; Drug Resistance, Bacterial ; Humans ; Larva/chemistry ; Microbial Sensitivity Tests ; Treatment Outcome ; Wound Healing ; Wound Infection/therapy
    Chemical Substances Antifungal Agents
    Language English
    Publishing date 2015-05
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1174873-4
    ISSN 1524-475X ; 1067-1927
    ISSN (online) 1524-475X
    ISSN 1067-1927
    DOI 10.1111/wrr.12287
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Exploring the anatomy and physiology of ageing. Part 7--the endocrine system.

    Knight, John / Nigam, Yamni

    Nursing times

    2008  Volume 104, Issue 45, Page(s) 24–25

    MeSH term(s) Aging/physiology ; Endocrine System/anatomy & histology ; Endocrine System/physiology ; Humans
    Language English
    Publishing date 2008-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 391202-4
    ISSN 0954-7762 ; 0029-6589
    ISSN 0954-7762 ; 0029-6589
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: The lymphatic system. Part 4--Pathophysiology.

    Nigam, Yamni / Knight, John

    Nursing times

    2008  Volume 104, Issue 16, Page(s) 24–25

    MeSH term(s) Humans ; Lymphatic Diseases/classification ; Lymphatic Diseases/physiopathology ; Lymphatic System/physiopathology
    Language English
    Publishing date 2008-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 391202-4
    ISSN 0954-7762 ; 0029-6589
    ISSN 0954-7762 ; 0029-6589
    Database MEDical Literature Analysis and Retrieval System OnLINE

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