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  1. Article ; Online: Global epidemiology of childhood bone and joint infection: a systematic review.

    Hunter, Sarah / Chan, Heidi / Baker, Joseph F

    Infection

    2022  Volume 50, Issue 2, Page(s) 329–341

    Abstract: Purpose: Childhood bone and joint infection (BJI) is a potentially severe disease that may have permanent sequelae, including growth impairment and limb deformity. It has been characterised in the literature with a focus on Western epidemiology; there ... ...

    Abstract Purpose: Childhood bone and joint infection (BJI) is a potentially severe disease that may have permanent sequelae, including growth impairment and limb deformity. It has been characterised in the literature with a focus on Western epidemiology; there are currently no reports detailing global epidemiology and bacteriology. This omits key data from determining temporal trends, appropriate antibiotic therapy, and resource allocation. This review aims to identify studies that characterise the incidence of childhood bone and joint infection or provide detailed bacteriology within their region.
    Methods: A systematic review of the literature was performed from 01/01/1980 to 31/12/2020. Data has been analysed to give incidence of disease per 100,000 children, primary pathogen by country where available, and risk ratio (RR) for disease by ethnicity. This is applicable for areas that experience race-related inequitable burden of disease.
    Results: Forty-four articles met the inclusion area; of these, seven were population-wide studies, primarily from Europe or the United States, and the remainder were cohort studies. Incidence could be derived from 26 studies compromising over 34, 000 children. Information on bacteriology was available from 39 publications (10, 957 cases). Methicillin-sensitive Staphylococcus aureus is the most common pathogen in the West. Recently, disease secondary to Kingella kingae and methicillin-resistant S. aureus has increased. Salmonella remains a dominant pathogen in African regions. Increased risk of disease is observed in Aboriginal, New Zealand Māori, Pacific, Indigenous Fijian, and Bedouin children.
    Conclusion: The current state of the literature detailing incidence of childhood BJI focuses on disease patterns from the West. There is a paucity of high-quality publications in the developing world. Despite these limitations, global trends in burden of disease show race-related inequitable risk of BJI. Temporal and regional variation in bacteriology can be demonstrated.
    Level of evidence: III.
    MeSH term(s) Anti-Bacterial Agents/therapeutic use ; Child ; Cohort Studies ; Humans ; Methicillin-Resistant Staphylococcus aureus ; Staphylococcal Infections/microbiology ; Staphylococcus aureus
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2022-01-20
    Publishing country Germany
    Document type Journal Article ; Review ; Systematic Review
    ZDB-ID 185104-4
    ISSN 1439-0973 ; 0300-8126 ; 0173-2129
    ISSN (online) 1439-0973
    ISSN 0300-8126 ; 0173-2129
    DOI 10.1007/s15010-021-01741-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A rare cause of pulmonary tuberculosis.

    Chan, Heidi H Y / Mpe, John

    The New Zealand medical journal

    2015  Volume 128, Issue 1423, Page(s) 81–83

    Abstract: We present a case of bovine tuberculosis in a 50-year-old Māori female. She had worked for approximately 7 years at a local freezing works where animal organs were cleaned and packed. The diagnosis was established 4 weeks after commencement of first-line ...

    Abstract We present a case of bovine tuberculosis in a 50-year-old Māori female. She had worked for approximately 7 years at a local freezing works where animal organs were cleaned and packed. The diagnosis was established 4 weeks after commencement of first-line anti-TB therapy. While human zoonotic tuberculosis may be uncommon in developed countries, its diagnosis still has important public health and treatment implications.
    MeSH term(s) Animals ; Antitubercular Agents/therapeutic use ; Cattle ; Drug Therapy, Combination ; Ethambutol/therapeutic use ; Female ; Humans ; Immunocompetence ; Isoniazid/therapeutic use ; Lung/diagnostic imaging ; Meat-Packing Industry ; Middle Aged ; Mycobacterium bovis/isolation & purification ; Radiography ; Rifampin/therapeutic use ; Tuberculosis, Bovine/diagnosis ; Tuberculosis, Bovine/drug therapy ; Tuberculosis, Pulmonary/diagnosis ; Tuberculosis, Pulmonary/drug therapy
    Chemical Substances Antitubercular Agents ; Ethambutol (8G167061QZ) ; Isoniazid (V83O1VOZ8L) ; Rifampin (VJT6J7R4TR)
    Language English
    Publishing date 2015-10-16
    Publishing country New Zealand
    Document type Case Reports ; Letter
    ZDB-ID 390590-1
    ISSN 1175-8716 ; 0028-8446 ; 0110-7704
    ISSN (online) 1175-8716
    ISSN 0028-8446 ; 0110-7704
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Hair highlights and severe acute irritant dermatitis ("burn") of the scalp.

    Chan, Heidi P / Maibach, Howard I

    Cutaneous and ocular toxicology

    2010  Volume 29, Issue 4, Page(s) 229–233

    Abstract: Context: These days, most celebrities--young and old--have their hair highlighted. That is why it is not surprising that even the youth have their hair highlighted as they emulate their favorite actors, unaware of the harmful consequences of this unsafe ...

    Abstract Context: These days, most celebrities--young and old--have their hair highlighted. That is why it is not surprising that even the youth have their hair highlighted as they emulate their favorite actors, unaware of the harmful consequences of this unsafe procedure. Hair highlighting involves decolorizing melanin pigments of select hair strands through an oxidation reaction under alkaline conditions by the active ingredients of the highlighting mixture--hydrogen peroxide, persulfates, and metasilicate. Hydrogen peroxide and the persulfates are flammable, necessitating that regulatory bodies (namely, the U.S. Food and Drug Administration [FDA] and the Cosmetic Ingredient Review [CIR] Expert Panel, the European Union's (EU), European Economic Community [EEC] directives, the Australian government's National Industrial Chemicals Notification and Assessment Scheme [NICNAS], and the Association of Southeast Asian Nations [ASEAN]) to regulate the permissible amounts of these chemicals in hair highlighting products.
    Objectives: To review published case reports of resulting in severe acute irritant dermatitis ("burns") of the scalp caused by hair highlighting, to explain why these scalp burns happen, to identify preventive measures to avoid such occurrences, and to discuss the implications for society.
    Materials and methods: We searched medical and scientific search engines and used keywords such as hair highlights, scalp burn, and other related terms..
    Results: Six articles were obtained, yielding 8 reported cases (2 of the 6 articles had 2 cases each) of hair highlighting resulting in scalp burns; these 8 cases were reviewed and analyzed. Five of the 8 patients belonged to the pediatric age group.
    Discussion: The causes of scalp burn were classified into 2 categories: chemical (caustic nature of the highlighting mixture, spillage of the hot mixture, toxic reaction to the dyes) and thermal (by contact of the scalp with overheated aluminum foil and by the blow dryer). The 5 pediatric patients in the group unnecessarily suffered pain and embarrassment caused by this procedure, as well as the risk of developing malignancy in the future.
    Conclusions: Hairstylists play a large role in the occurrence of scalp burns. Thus, they need to be careful and knowledgeable of the caustic nature of the highlighting mixture and the potential harm these chemicals may cause. The authors strongly propose that the relevant regulatory bodies review the permissible levels of the caustic chemicals, and that this unsafe procedure should be performed only on adults.
    MeSH term(s) Ammonium Sulfate/toxicity ; Burns, Chemical/etiology ; Burns, Chemical/pathology ; Consumer Product Safety ; Dermatitis, Irritant/etiology ; Dermatitis, Irritant/pathology ; Hair Preparations/adverse effects ; Humans ; Hydrogen Peroxide/toxicity ; Irritants/adverse effects ; Oxidants/toxicity ; Scalp/drug effects ; Scalp/pathology ; Silicates/toxicity
    Chemical Substances Hair Preparations ; Irritants ; Oxidants ; Silicates ; sodium metasilicate (052612U92L) ; ammonium peroxydisulfate (22QF6L357F) ; Hydrogen Peroxide (BBX060AN9V) ; Ammonium Sulfate (SU46BAM238)
    Language English
    Publishing date 2010-12
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 605635-0
    ISSN 1556-9535 ; 1556-9527 ; 0731-3829
    ISSN (online) 1556-9535
    ISSN 1556-9527 ; 0731-3829
    DOI 10.3109/15569527.2010.509852
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A randomized, double-blind, placebo-controlled trial to determine the efficacy and safety of lactoferrin with vitamin E and zinc as an oral therapy for mild to moderate acne vulgaris.

    Chan, Heidi / Chan, Gertrude / Santos, Joyce / Dee, Kennie / Co, Juliene Kimberly

    International journal of dermatology

    2017  Volume 56, Issue 6, Page(s) 686–690

    Abstract: Lactoferrin is an iron-binding milk-derived protein that has shown antibacterial and anti-inflammatory effects in vitro and in vivo. The objective of this study was to determine the efficacy and safety of lactoferrin, combined with vitamin E and zinc, ... ...

    Abstract Lactoferrin is an iron-binding milk-derived protein that has shown antibacterial and anti-inflammatory effects in vitro and in vivo. The objective of this study was to determine the efficacy and safety of lactoferrin, combined with vitamin E and zinc, for mild to moderate acne vulgaris. In this randomized, double-blind, placebo-controlled trial, 168 subjects aged 13-40 years old were randomly assigned to take either a capsule formulation containing lactoferrin with vitamin E and zinc or placebo twice a day for 3 months. The primary outcome measure was a reduction in the number of acne lesions compared to placebo. A total of 164 subjects completed the study per protocol. The lactoferrin group (n = 82) showed a significant median percent reduction in total lesions as early as 2 weeks (14.5%, P = 0.0120), with the maximum reduction occurring at week 10 (28.5%, P < 0.0001) compared to placebo group (n = 82). Maximum reduction in comedones (32.5%, P < 0.0001) and inflammatory lesions (44%, P < 0.0001) was also seen at week 10 compared to placebo. Sebum scores were improved by week 12. No adverse events were observed during the trial. A twice daily regimen of lactoferrin with vitamin E and zinc significantly reduced acne lesions in people with mild to moderate acne vulgaris.
    Language English
    Publishing date 2017-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 412254-9
    ISSN 1365-4632 ; 0011-9059 ; 1461-1244
    ISSN (online) 1365-4632
    ISSN 0011-9059 ; 1461-1244
    DOI 10.1111/ijd.13607
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Moustache p-phenylenediamine dye allergic contact dermatitis with distant site involvement - an atypical presentation.

    Chan, Heidi P / Maibach, Howard I

    Contact dermatitis

    2008  Volume 58, Issue 3, Page(s) 179–180

    MeSH term(s) Allergens/adverse effects ; Dermatitis, Allergic Contact/diagnosis ; Dermatitis, Allergic Contact/etiology ; Dermatitis, Allergic Contact/pathology ; Dermatitis, Perioral/chemically induced ; Dermatitis, Perioral/diagnosis ; Dermatitis, Perioral/pathology ; Diagnosis, Differential ; Hair Dyes/adverse effects ; Humans ; Male ; Middle Aged ; Patch Tests ; Phenylenediamines/adverse effects
    Chemical Substances Allergens ; Hair Dyes ; Phenylenediamines ; 4-phenylenediamine (U770QIT64J)
    Language English
    Publishing date 2008-03
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 193121-0
    ISSN 1600-0536 ; 0105-1873
    ISSN (online) 1600-0536
    ISSN 0105-1873
    DOI 10.1111/j.1600-0536.2007.01234.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hydrogen peroxide, blanching, and skin: an overview.

    Chan, Heidi P / Maibach, Howard I

    Cutaneous and ocular toxicology

    2008  Volume 27, Issue 4, Page(s) 307–309

    Abstract: For more than a century, hydrogen peroxide (H(2)O(2)) has been known as an antiseptic. Three percent H(2)O(2) is used in minor wound irrigations, producing oxygen bubbles and transient skin blanching. Many people who use H(2)O(2) as an antiseptic are ... ...

    Abstract For more than a century, hydrogen peroxide (H(2)O(2)) has been known as an antiseptic. Three percent H(2)O(2) is used in minor wound irrigations, producing oxygen bubbles and transient skin blanching. Many people who use H(2)O(2) as an antiseptic are alarmed at this phenomenon. This concise report provides probable mechanisms on how H(2)O(2)-induced skin blanching is produced.
    MeSH term(s) Anti-Infective Agents, Local/pharmacology ; Hemoglobins ; Humans ; Hydrogen Peroxide/pharmacology ; Oxyhemoglobins ; Skin/drug effects
    Chemical Substances Anti-Infective Agents, Local ; Hemoglobins ; Oxyhemoglobins ; deoxyhemoglobin (9008-02-0) ; Hydrogen Peroxide (BBX060AN9V)
    Language English
    Publishing date 2008
    Publishing country England
    Document type Journal Article
    ZDB-ID 605635-0
    ISSN 1556-9535 ; 1556-9527 ; 0731-3829
    ISSN (online) 1556-9535
    ISSN 1556-9527 ; 0731-3829
    DOI 10.1080/15569520802340396
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Low mercury levels in marine fish from estuarine and coastal environments in southern China.

    Pan, Ke / Chan, Heidi / Tam, Yin Ki / Wang, Wen-Xiong

    Environmental pollution (Barking, Essex : 1987)

    2014  Volume 185, Page(s) 250–257

    Abstract: This study is the first comprehensive evaluation of total Hg and methylmercury (MeHg) concentrations in wild marine fish from an estuarine and a coastal ecosystem in southern China. A total of 571 fish from 54 different species were examined. Our results ...

    Abstract This study is the first comprehensive evaluation of total Hg and methylmercury (MeHg) concentrations in wild marine fish from an estuarine and a coastal ecosystem in southern China. A total of 571 fish from 54 different species were examined. Our results showed that the Hg levels were generally low in the fish, and the Hg levels were below 30 ng g(-1) (wet weight) for 82% of the samples, which may be related to the reduced size of the fish and altered food web structure due to overfishing. Decreased coastal wetland coverage and different carbon sources may be responsible for the habitat-specific Hg concentrations. The degree of biomagnification was relatively low in the two systems.
    MeSH term(s) Animals ; China ; Ecosystem ; Environmental Monitoring ; Estuaries ; Fishes/metabolism ; Food Chain ; Mercury/metabolism ; Methylmercury Compounds/metabolism ; Seawater/chemistry ; Water Pollutants, Chemical/metabolism
    Chemical Substances Methylmercury Compounds ; Water Pollutants, Chemical ; Mercury (FXS1BY2PGL)
    Language English
    Publishing date 2014-02
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2013.11.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Skin decontamination: principles and perspectives.

    Chan, Heidi P / Zhai, Hongbo / Hui, Xiaoying / Maibach, Howard I

    Toxicology and industrial health

    2013  Volume 29, Issue 10, Page(s) 955–968

    Abstract: Skin decontamination is the primary intervention needed in chemical, biological and radiological exposures, involving immediate removal of the contaminant from the skin performed in the most efficient way. The most readily available decontamination ... ...

    Abstract Skin decontamination is the primary intervention needed in chemical, biological and radiological exposures, involving immediate removal of the contaminant from the skin performed in the most efficient way. The most readily available decontamination system on a practical basis is washing with soap and water or water only. Timely use of flushing with copious amounts of water may physically remove the contaminant. However, this traditional method may not be completely effective, and contaminants left on the skin after traditional washing procedures can have toxic consequences. This article focuses on the principles and practices of skin decontamination.
    MeSH term(s) Animals ; Chemical Warfare Agents ; Decontamination/methods ; Dermatitis ; Detergents ; Environmental Exposure ; Humans ; Skin/metabolism ; Skin Absorption ; Swine
    Chemical Substances Chemical Warfare Agents ; Detergents
    Language English
    Publishing date 2013-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 56831-4
    ISSN 1477-0393 ; 0748-2337
    ISSN (online) 1477-0393
    ISSN 0748-2337
    DOI 10.1177/0748233712448112
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Produce-induced contact urticaria and dermatitis: Solanaceae and Alliaceae.

    Alikhan, Ali / Chan, Heidi P / Maibach, Howard I

    Contact dermatitis

    2009  Volume 60, Issue 3, Page(s) 174–176

    MeSH term(s) Allergens/adverse effects ; Allium/adverse effects ; Dermatitis, Allergic Contact/diagnosis ; Dermatitis, Allergic Contact/etiology ; Dermatitis, Occupational/blood ; Dermatitis, Occupational/diagnosis ; Dermatitis, Occupational/etiology ; Female ; Food Handling ; Humans ; Immunoglobulin E/blood ; Middle Aged ; Occupational Exposure/adverse effects ; Patch Tests/methods ; Solanaceae/adverse effects ; Urticaria/chemically induced ; Urticaria/diagnosis ; Vegetable Proteins/adverse effects ; Vegetables/adverse effects
    Chemical Substances Allergens ; Vegetable Proteins ; Immunoglobulin E (37341-29-0)
    Language English
    Publishing date 2009-03
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 193121-0
    ISSN 1600-0536 ; 0105-1873
    ISSN (online) 1600-0536
    ISSN 0105-1873
    DOI 10.1111/j.1600-0536.2008.01466.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Measuring human skin buffering capacity: an in vitro model.

    Zhai, Hongbo / Chan, Heidi P / Farahmand, Sara / Maibach, Howard I

    Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI)

    2009  Volume 15, Issue 4, Page(s) 470–475

    Abstract: Background/purpose: It has been thought that skin possesses buffering capacity. This study measured the skin buffering capacity against two model solutions of acid and base at three concentrations with an in vitro system.: Methods: Ten microliters of ...

    Abstract Background/purpose: It has been thought that skin possesses buffering capacity. This study measured the skin buffering capacity against two model solutions of acid and base at three concentrations with an in vitro system.
    Methods: Ten microliters of model base (sodium hydroxide--NaOH) and acid (hydrochloric acid--HCl) solutions at concentrations of 0.025, 0.05, and 0.1 N was applied to human cadaver skin (3.18 microL/cm(2)) placed onto glass diffusion cells. Phosphate-buffered saline (PBS) was used as a standard buffer solution. Deionized water served as the negative control, whereas untreated skin served as the blank control. Skin pH was read and recorded immediately following dosing (0 time), and at 10 and 30 min of post-dosing. After the 30 min of dosing, each skin, except untreated skin (blank control), was then washed by applying 1 cm(3) of deionized water. The pH on each washed skin was measured immediately following washing, and the pH measurement was repeated at 10 and 30 min of post-washing. Six replicates were conducted.
    Results: The pH values sharply significantly increased (P<0.05) immediately following dosing with NaOH at all concentrations (the highest concentration, caused the highest pH), and then decreased closely to baselines within 30 min post-application but still remained at significantly (P<0.05) higher values when compared with the blank control (untreated skin). HCl (acid) significantly (P<0.05) decreased skin pH immediately following dosing with all concentrations (the highest concentration, caused the lowest pH) and then restored rapidly to baseline. There was no significant difference in post-washing procedures on the skins that were pre-treated with the acid (HCI) solutions. However, with all base solutions (NaOH) pre-treated skin, pH values were significantly higher (P<0.05) at all time points post-washing. Furthermore, both PBS and water controls significantly elevated (P<0.05) the pH values following washing.
    Conclusion: Skin pH and its buffering capacity can be measured on human cadaver skin in vitro, which may partially replicate the response of in vivo skin. Dose-response was noted; i.e. the higher concentration caused larger changes in skin pH. In addition, the restoration of skin pH is relatively faster with acid when compared with base treatment. Clinical implications are offered.
    MeSH term(s) Acid-Base Equilibrium/drug effects ; Acid-Base Equilibrium/physiology ; Buffers ; Dose-Response Relationship, Drug ; Humans ; Hydrochloric Acid/pharmacology ; Hydrogen-Ion Concentration/drug effects ; In Vitro Techniques ; Models, Biological ; Skin/drug effects ; Skin/metabolism ; Skin Tests ; Sodium Hydroxide/pharmacology
    Chemical Substances Buffers ; Sodium Hydroxide (55X04QC32I) ; Hydrochloric Acid (QTT17582CB)
    Language English
    Publishing date 2009-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 1229160-2
    ISSN 1600-0846 ; 0909-752X ; 1397-1344
    ISSN (online) 1600-0846
    ISSN 0909-752X ; 1397-1344
    DOI 10.1111/j.1600-0846.2009.00392.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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