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1.
Afr J Reprod Health ; 26(6): 97-103, 2022 Jun.
Article in English | MEDLINE | ID: mdl-37585062

ABSTRACT

This study was conducted to describe the distribution of precancerous and cancerous lesions of the cervix uteri, enumerated during a mass screening in Burkina Faso. We conducted a cross-sectional study involving 577 women aged 18 to 60 years, carried out from November 23 to December 19, 2013, in the city of Bobo-Dioulasso and in the rural commune of Bama. Regarding the screening results, 89 participants (15.4%) were positive for pre-malignant cervical lesions. Chi-square testing and logistic regression analyses were conducted to identify the likelihood of cervical pre-cancer lesion in the women. Participants less than 29 years old were approximately 3 times more likely to have cervical lesions than participants >39 years. Participants who were parous (1-3 deliveries) and multiparous (four or more deliveries) were approximately 4 times more likely to present with cervical lesions than nulliparous women. Access to screening services is low in the Bobo-Dioulasso region. Further research should be conducted to understand the incidence and distribution of cervical precancerous and cancerous lesions in Burkina Faso.


Subject(s)
Precancerous Conditions , Uterine Cervical Neoplasms , Humans , Female , Adult , Acetic Acid , Uterine Cervical Neoplasms/diagnosis , Uterine Cervical Neoplasms/epidemiology , Uterine Cervical Neoplasms/prevention & control , Burkina Faso/epidemiology , Cross-Sectional Studies , Early Detection of Cancer , Precancerous Conditions/diagnosis , Precancerous Conditions/epidemiology
2.
Rev Neurol ; 73(6): 187-193, 2021 Sep 01.
Article in Spanish, English | MEDLINE | ID: mdl-34515331

ABSTRACT

INTRODUCTION: Septic thrombosis of intracranial venous sinuses (STSV) is a rare and severe complication of cranial infections. MATERIALS AND METHODS: The main objective of this paper is to describe the clinical data, diagnostic procedures, treatment and evolution of a series of cases of STSV. In addition, the current literature is reviewed. Observational retrospective study by review of medical histories (January 1995-December 2016). The data collected were: clinical, analytical, epidemiological, microbiological, radiological, management and follow-up. A descriptive and statistical analysis of the data was done. RESULTS: Twelve children were included (86,832 admissions studied). They have a median age of 4.5 years (range 1-13) with a median time of symptoms of 6 days (range 1-25). At admission, the clinical data were: fever (11/12), vomiting (9/12) and headache (8/12). They also showed bad general status 12/12, 7/12 acute otitis media and 5/12 VI cranial nerve paresis. The lumbar puncture was pathological in 4/12. The most frequently microorganism isolated was Streptococcus sp. Prothrombotic mutations were confirmed on 2/12. Cranial computed tomography allowed diagnosis in 9/12; the magnetic resonance imaging achieves that in 12/12. Previous neurological signs or time to diagnosis did not influence the appearance of other image complications. All received antibiotic treatment, heparin 10/12 and 11/12 surgery. There were no sequels. CONCLUSION: In our series otitis, headache, vomiting and fever were prevalent. Complementary tests allowed the suspect but the definitive diagnosis was obtained by neuroimaging. There were no sequels and the therapies were mainly wide broad-spectrum antibiotics, heparin, and surgical.


TITLE: Trombosis séptica pediátrica de senos venosos intracraneales: del diagnóstico al alta. Veinte años de experiencia.Introducción. La trombosis séptica de los senos venosos intracraneales (TSSV) es una complicación rara y grave de las infecciones craneales. Materiales y métodos. El objetivo principal de este trabajo es describir los datos clínicos, procedimientos diagnósticos, tratamiento y evolución de una serie de casos de TSSV. Además, se revisa la bibliografía actual. Es un estudio retrospectivo observacional mediante revisión de historias médicas (enero de 1995-diciembre de 2016). Los datos recogidos fueron: clínicos, analíticos, epidemiológicos, microbiológicos, radiológicos, de manejo y de seguimiento. Se realizó un análisis descriptivo y estadístico de los datos. Resultados. Se incluyó a 12 niños (86.832 ingresos estudiados). La mediana de edad fue de 4,5 años (rango: 1-13), con un tiempo medio de síntomas de 6 días (rango: 1-25). En el momento de la admisión, los datos clínicos fueron: fiebre (11/12), vómitos (9/12) y dolor de cabeza (8/12). También mostraron mal estado general, 12/12; otitis media aguda, 7/12; y paresia del VI par craneal, 5/12. La punción lumbar fue patológica en 4/12. El microorganismo más frecuentemente aislado fue Streptococcus spp. Se confirmaron mutaciones protrombóticas en 2/12. La tomografía computarizada craneal permitió el diagnóstico en 9/12; la resonancia magnética lo logró en 12/12. Los signos neurológicos anteriores o el tiempo de diagnóstico no influyeron en la aparición de otras complicaciones de la imagen. Recibieron tratamiento antibiótico 12/12; heparina, 10/12; y cirugía, 11/12. No hubo secuelas. Conclusión. En nuestra serie, la otitis, el dolor de cabeza, los vómitos y la fiebre fueron frecuentes. Las pruebas complementarias permitieron el diagnóstico de sospecha, pero el diagnóstico definitivo se obtuvo por neuroimagen. No hubo secuelas y las terapias fueron principalmente antibióticos de amplio espectro, heparina y cirugía.


Subject(s)
Sepsis/diagnosis , Sepsis/therapy , Sinus Thrombosis, Intracranial/diagnosis , Sinus Thrombosis, Intracranial/therapy , Adolescent , Child , Child, Preschool , Female , Humans , Infant , Male , Patient Discharge , Retrospective Studies , Sepsis/complications , Sinus Thrombosis, Intracranial/microbiology , Time Factors
3.
Rev. neurol. (Ed. impr.) ; 73(6): 187-193, Sep 16, 2021. tab
Article in English, Spanish | IBECS | ID: ibc-227999

ABSTRACT

Introducción: La trombosis séptica de los senos venosos intracraneales (TSSV) es una complicación rara y grave de las infecciones craneales. Materiales y métodos: El objetivo principal de este trabajo es describir los datos clínicos, procedimientos diagnósticos, tratamiento y evolución de una serie de casos de TSSV. Además, se revisa la bibliografía actual. Es un estudio retrospectivo observacional mediante revisión de historias médicas (enero de 1995-diciembre de 2016). Los datos recogidos fueron: clínicos, analíticos, epidemiológicos, microbiológicos, radiológicos, de manejo y de seguimiento. Se realizó un análisis descriptivo y estadístico de los datos. Resultados: Se incluyó a 12 niños (86.832 ingresos estudiados). La mediana de edad fue de 4,5 años (rango: 1-13), con un tiempo medio de síntomas de 6 días (rango: 1-25). En el momento de la admisión, los datos clínicos fueron: fiebre (11/12), vómitos (9/12) y dolor de cabeza (8/12). También mostraron mal estado general, 12/12; otitis media aguda, 7/12; y paresia del VI par craneal, 5/12. La punción lumbar fue patológica en 4/12. El microorganismo más frecuentemente aislado fue Streptococcus spp. Se confirmaron mutaciones protrombóticas en 2/12. La tomografía computarizada craneal permitió el diagnóstico en 9/12; la resonancia magnética lo logró en 12/12. Los signos neurológicos anteriores o el tiempo de diagnóstico no influyeron en la aparición de otras complicaciones de la imagen. Recibieron tratamiento antibiótico 12/12; heparina, 10/12; y cirugía, 11/12. No hubo secuelas. Conclusión: En nuestra serie, la otitis, el dolor de cabeza, los vómitos y la fiebre fueron frecuentes. Las pruebas complementarias permitieron el diagnóstico de sospecha, pero el diagnóstico definitivo se obtuvo por neuroimagen. No hubo secuelas y las terapias fueron principalmente antibióticos de amplio espectro, heparina y cirugía.(AU)


Introduction: Septic thrombosis of intracranial venous sinuses (STSV) is a rare and severe complication of cranial infections. Materials and methods: The main objective of this paper is to describe the clinical data, diagnostic procedures, treatment and evolution of a series of cases of STSV. In addition, the current literature is reviewed. Observational retrospective study by review of medical histories (January 1995-December 2016). The data collected were: clinical, analytical, epidemiological, microbiological, radiological, management and follow-up. A descriptive and statistical analysis of the data was done. Results: Twelve children were included (86,832 admissions studied). They have a median age of 4.5 years (range 1-13) with a median time of symptoms of 6 days (range 1-25). At admission, the clinical data were: fever (11/12), vomiting (9/12) and headache (8/12). They also showed bad general status 12/12, 7/12 acute otitis media and 5/12 VI cranial nerve paresis. The lumbar puncture was pathological in 4/12. The most frequently microorganism isolated was Streptococcus sp. Prothrombotic mutations were confirmed on 2/12. Cranial computed tomography allowed diagnosis in 9/12; the magnetic resonance imaging achieves that in 12/12. Previous neurological signs or time to diagnosis did not influence the appearance of other image complications. All received antibiotic treatment, heparin 10/12 and 11/12 surgery. There were no sequels. Conclusion: In our series otitis, headache, vomiting and fever were prevalent. Complementary tests allowed the suspect but the definitive diagnosis was obtained by neuroimaging. There were no sequels and the therapies were mainly wide broad-spectrum antibiotics, heparin, and surgical.(AU)


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Thrombosis , Patient Discharge , Sepsis/diagnosis , Intracranial Thrombosis/diagnosis , Heparin , Retrospective Studies , Neurology , Nervous System Diseases , Sepsis/complications , Sepsis/therapy , Time Factors
4.
Arch Pediatr ; 28(2): 150-155, 2021 Feb.
Article in English | MEDLINE | ID: mdl-33339722

ABSTRACT

PURPOSE: The treatment applied for children admitted to the pediatric intensive care unit (PICU) for severe acute bronchiolitis may differ from general recommendations. The first objective of our study was to describe the treatments offered to these children in a Spanish tertiary PICU. The second objective was to analyse the changes in management derived from the publication of the American Academy of Pediatrics (AAP) bronchiolitis guideline in 2014. METHODS: This was a retrospective-prospective observational study conducted during two epidemic waves (2014-2015 and 2015-2016). The AAP guidelines were distributed and taught to PICU staff between both epidemic waves. RESULTS: A total of 138 children were enrolled (78 male). In the first period, 78 children were enrolled. The median age was 1.8 months (IQR 1.1-3.6). There were no differences between the management in the two periods, except for the use of high-flow oxygen therapy (HFOT); its use increased in the second period. Overall, 83% of patients received non-invasive ventilation or HFOT. Children older than 12 months received HFOT exclusively. In comparison, continuous positive airway pressure and bi-level positive airway pressure were used less during the period 2015-2016 (P=0.036). Regarding pharmacological therapy, 70% of patients received antibiotics, 23% steroids, 33% salbutamol, 31% adrenaline, and 7% hypertonic saline. The mortality rate was zero. CONCLUSIONS: Our PICU did not follow the AAP recommendations. There were no differences between the two periods, except in the use of HFOT. All children older than 12 months received HFOT exclusively. The rate of using invasive mechanical ventilation was also low.


Subject(s)
Anti-Bacterial Agents/therapeutic use , Anti-Inflammatory Agents/therapeutic use , Bronchiolitis/therapy , Bronchodilator Agents/therapeutic use , Guideline Adherence/statistics & numerical data , Practice Patterns, Physicians'/trends , Respiratory Therapy/methods , Acute Disease , Bronchiolitis/diagnosis , Combined Modality Therapy , Critical Care/methods , Critical Care/standards , Critical Care/trends , Female , Humans , Infant , Infant, Newborn , Intensive Care Units, Pediatric , Male , Practice Guidelines as Topic , Practice Patterns, Physicians'/standards , Prospective Studies , Respiratory Therapy/standards , Respiratory Therapy/trends , Retrospective Studies , Severity of Illness Index , Spain
7.
Eur J Clin Microbiol Infect Dis ; 38(6): 1079-1085, 2019 Jun.
Article in English | MEDLINE | ID: mdl-30712229

ABSTRACT

The CD64 receptor has been described as an interesting bacterial infection biomarker. Its expression has not been studied in previously healthy children admitted to pediatric critical care unit (PICU). Our objective was firstly to describe the CD64 expression and secondly study its diagnostic accuracy to discriminate bacterial versus viral infection in this children. We made a prospective double-blind observational study (March 2016-February 2018). A flow cytometry (FC) was done from peripheral blood at PICU admission. We studied the percentage of CD64+ neutrophils and the CD64 mean fluorescence intensity (MFI) on neutrophils (nCD64) and monocytes (mCD64). Statistical analyses were performed with non-parametric tests (p < 0.05). Twenty children in the bacterial infection group (BIG) and 25 in the viral infection group (VIG). Children in BIG showed higher values of CD64+ neutrophils (p = 0.000), nCD64 (p = 0.001), and mCD64 (p = 0.003). In addition, CD64+ neutrophils and nCD64 expression have positive correlation with procalcitonin and C reactive protein. The nCD64 area under the curve (AUC) was 0.83 (p = 0.000). The %CD64+ neutrophils showed an AUC of 0.828 (p = 0.000). The mCD64 AUC was 0.83 (p = 0.003). The nCD64 and %CD64+ neutrophils also showed higher combined values of sensitivity (74%) and specificity (90%) than all classical biomarkers.In our series CD64 expression allows to discriminate between bacterial and viral infection at PICU admission. Future studies should confirm this and be focused in the study of CD64 correlation with clinical data and its utility as an evolution biomarker in critical care children.


Subject(s)
Bacterial Infections/diagnosis , Monocytes/metabolism , Neutrophils/metabolism , Receptors, IgG/blood , Area Under Curve , Bacterial Infections/blood , Biomarkers/blood , Child , Child, Preschool , Double-Blind Method , Female , Flow Cytometry , Humans , Infant , Intensive Care Units , Male , Prospective Studies , Receptors, IgG/metabolism , Sensitivity and Specificity , Virus Diseases/blood , Virus Diseases/diagnosis
12.
An. pediatr. (2003, Ed. impr.) ; 81(5): 318-321, nov. 2014. tab
Article in Spanish | IBECS | ID: ibc-129379

ABSTRACT

La trombocitosis es un hallazgo casual frecuente en pediatría. En niños, predominan las formas secundarias, siendo las infecciones su causa más prevalente. Se distinguen 4 grados de trombocitosis en función del número de plaquetas; en la forma extrema, se supera el 1.000.000/mm3. Se presenta un caso de trombocitosis extrema reactiva en un niño sano de 6 años, que requirió ingreso en cuidados intensivos para tratamiento y diagnóstico (cifra máxima de plaquetas de 7.283.000/mm3). Se revisan las diferentes causas de trombocitosis en la infancia, se describe el diagnóstico diferencial y se discute sobre los diferentes tratamientos disponibles ante un caso como el descrito


Thrombocytosis is usually a casual finding in children. Reactive or secondary thrombocytosis is the more common form, being the infections diseases the most prevalent cause of it. Regarding the number of platelets there are four degrees of thrombocytosis; in its extreme degree the number of platelets exceeds 1,000,000/mm3. We describe a case of extreme reactive thrombocytosis in a healthy 6-year-old child. He required critical care admission for diagnosis and treatment (maximum number of platelets 7,283,000/mm3). We review the different causes of thrombocytosis in childhood, the differential diagnosis, and the available treatments in case of extreme thrombocytosis


Subject(s)
Humans , Male , Child , Thrombocytosis/complications , Pneumonia/complications , Diagnosis, Differential , Intensive Care Units, Pediatric/statistics & numerical data , Platelet Count , Incidental Findings , Diagnostic Tests, Routine
13.
An Pediatr (Barc) ; 81(5): 318-21, 2014 Nov.
Article in Spanish | MEDLINE | ID: mdl-24315421

ABSTRACT

Thrombocytosis is usually a casual finding in children. Reactive or secondary thrombocytosis is the more common form, being the infections diseases the most prevalent cause of it. Regarding the number of platelets there are four degrees of thrombocytosis; in its extreme degree the number of platelets exceeds 1,000,000/mm(3). We describe a case of extreme reactive thrombocytosis in a healthy 6-year-old child. He required critical care admission for diagnosis and treatment (maximum number of platelets 7,283,000/mm(3)). We review the different causes of thrombocytosis in childhood, the differential diagnosis, and the available treatments in case of extreme thrombocytosis.


Subject(s)
Thrombocytosis , Child , Humans , Male , Thrombocytosis/complications , Thrombocytosis/diagnosis , Thrombocytosis/therapy
14.
An Pediatr (Engl Ed) ; 81(5): 318-321, 2014 Nov.
Article in English | MEDLINE | ID: mdl-32289039

ABSTRACT

Thrombocytosis is usually found by chance in children. Reactive or secondary thrombocytosis is the more common form, with infectious diseases being the most prevalent cause of it. Regarding the number of platelets there are four degrees of thrombocytosis; in its extreme degree the number of platelets exceeds 1,000,000/mm3. We describe a case of extreme reactive thrombocytosis in a healthy 6-year-old child. He required critical care admission for diagnosis and treatment (maximum number of platelets 7,283,000/mm3). We review the different causes of thrombocytosis in childhood, the differential diagnosis, and the available treatments in case of extreme thrombocytosis.


La trombocitosis es un hallazgo casual frecuente en pediatría. En niños, predominan las formas secundarias, siendo las infecciones su causa más prevalente. Se distinguen 4 grados de trombocitosis en función del número de plaquetas; en la forma extrema, se supera el 1.000.000/mm3. Se presenta un caso de trombocitosis extrema reactiva en un niño sano de 6 años, que requirió ingreso en cuidados intensivos para tratamiento y diagnóstico (cifra máxima de plaquetas de 7.283.000/mm3). Se revisan las diferentes causas de trombocitosis en la infancia, se describe el diagnóstico diferencial y se discute sobre los diferentes tratamientos disponibles ante un caso como el descrito.

15.
Int J Lang Commun Disord ; 48(4): 402-20, 2013.
Article in English | MEDLINE | ID: mdl-23889836

ABSTRACT

BACKGROUND: The Living with Dysarthria group programme, devised for people with post-stroke dysarthia and family members, was piloted twice. Feedback from those who experience an intervention contributes to the evaluation of speech and language therapy programmes, giving the participant view of the intervention's value and guiding further developments. RESEARCH QUESTION: What feedback do participants in the Living with Dysarthria programme provide, informing on its perceived usefulness and guiding its future development? METHODS & PROCEDURES: Nine people with chronic dysarthria following stroke and four family members who completed the Living with Dysarthria programme all contributed to Focus Group (FG) discussion, transcribed and thematically analysed, and completed an Anonymous Questionnaire Evaluation (AQE), comprising closed statements and open questions. An anonymous descriptive adjective selection task (ADAST) was also used. OUTCOMES & RESULTS: The varied forms of feedback provided complementary information. Thematic analysis of FG data and AQE open question responses were configured around programme benefits, programme structure and content, and programme practicalities. Benefits associated with participation included learning and insight, being supported by peers and professionals, and improved speech and confidence. These are consistent with the main programme elements of education, support and speech practice. All activities were seen as relevant and positively received. Flexibility, recognition of and catering to individual needs were valued characteristics. The community location was approved by all. Most participants thought the format of eight weekly sessions of 2 h was appropriate. Responses to AQE closed statements provided almost unanimous confirmation of the very positive feedback conveyed in FG discussions. The main response to suggested improvements in AQEs was that the number of sessions should be increased. Feedback indicated that for a few individuals there was negative reaction to some facts about stroke, home practice tasks were difficult to complete, the person with dysarthria/family member pair may not be the optimum combination for paired practice activities and pre-programme information should be extended. The ADAST showed that the programme was enjoyable, interesting, stimulating and useful. CONCLUSIONS & IMPLICATIONS: Participant feedback indicates that group therapy, with family member participation, is a valid form of management for chronic post-stroke dysarthria. Education, peer and professional support, and speech practice are confirmed as relevant programme components. Consistent majority opinions were communicated in different situations and via varied mediums. Some individuals expressed views relevant to their own needs, and these responses also inform future implementation of the Living with Dysarthria programme.


Subject(s)
Dysarthria/psychology , Dysarthria/rehabilitation , Patient Satisfaction , Psychotherapy, Group/organization & administration , Stroke Rehabilitation , Stroke/psychology , Aged , Aged, 80 and over , Attitude , Chronic Disease , Family/psychology , Feedback, Psychological , Female , Focus Groups , Humans , Male , Middle Aged , Program Evaluation , Psychotherapy, Group/methods , Psychotherapy, Group/standards , Surveys and Questionnaires , Treatment Outcome
16.
Adv Biochem Eng Biotechnol ; 118: 189-209, 2010.
Article in English | MEDLINE | ID: mdl-19475371

ABSTRACT

Bioreporters have been widely acknowledged to represent new and novel approaches in applied microbiology. Despite a plethora of constructions covering a diverse range of detection devices and host organisms, genuine applications are rare. Here, their application in the areas of general environmental microbiology, analytical detection and bioremediation are summarised and critically considered. Future applications require a more integrated approach such that those constructing bioreporters are aware of the needs of the end-user. A decade ago, predictions were made of the pivotal role of bioreporters and our future reliance; this fortune telling may take another decade to reach fruition.


Subject(s)
Biosensing Techniques/methods , Environmental Microbiology , Biodegradation, Environmental
17.
Lett Appl Microbiol ; 49(6): 769-74, 2009 Dec.
Article in English | MEDLINE | ID: mdl-19843209

ABSTRACT

AIMS: To examine plant terpenoids as inducers of TCE (trichloroethylene) biotransformation by an indigenous microbial community originating from a plume of TCE-contaminated groundwater. METHODS AND RESULTS: One-litre microcosms of groundwater were spiked with 100 micromol 1(-1) of TCE and amended weekly for 16 weeks with 20 microl 1(-1) of the following plant monoterpenes: linalool, pulegone, R-(+) carvone, S-(-) carvone, farnesol, cumene. Yeast extract-amended and unamended control treatments were also prepared. The addition of R-carvone and S-carvone, linalool and cumene resulted in the biotransformation of upwards of 88% of the TCE, significantly more than the unamendment control (61%). The aforementioned group of terpenes also significantly (P < 0.05) allowed more TCE to be degraded than the remaining two terpenes (farnesol and pulegone), and the yeast extract treatment which biotransformed 74-75% of the TCE. The microbial community profile was monitored by denaturing gradient gel electrophoresis and demonstrated much greater similarities between the microbial communities in terpene-amended treatments than in the yeast extract or unamended controls. CONCLUSIONS: TCE biotransformation can be significantly enhanced through the addition of selected plant terpenoids. SIGNIFICANCE AND IMPACT OF THE STUDY: Plant terpenoid and nutrient supplementation to groundwater might provide an environmentally benign means of enhancing the rate of in situ TCE bioremediation.


Subject(s)
Bacteria/metabolism , Plants/chemistry , Terpenes/chemistry , Trichloroethylene/metabolism , Water Microbiology , Biodegradation, Environmental , Biotransformation , Chlorides/analysis , Chlorides/metabolism , Trichloroethylene/analysis , Water Pollutants, Chemical/metabolism
18.
Environ Pollut ; 157(5): 1643-8, 2009 May.
Article in English | MEDLINE | ID: mdl-19200630

ABSTRACT

Despite numerous reviews suggesting that microbial biosensors could be used in many environmental applications, in reality they have failed to be used for which they were designed. In part this is because most of these sensors perform in an aqueous phase and a buffered medium, which is in contrast to the nature of genuine environmental systems. In this study, a range of non-exhaustive extraction techniques (NEETs) were assessed for (i) compatibility with a naphthalene responsive biosensor and (ii) correlation with naphthalene biodegradation. The NEETs removed a portion of the total soil naphthalene in the order of methanol > HPCD > betaCD > water. To place the biosensor performance to NEETs in context, a biodegradation experiment was carried out using historically contaminated soils. By coupling the HPCD extraction with the biosensor, it was possible to assess the fraction of the naphthalene capable of undergoing microbial degradation in soil.


Subject(s)
Industrial Waste , Naphthalenes/metabolism , Pseudomonas fluorescens/metabolism , Soil Microbiology , Soil Pollutants/metabolism , Biodegradation, Environmental , Environmental Monitoring/methods , Naphthalenes/analysis , Soil/analysis , Soil Pollutants/analysis
19.
Environ Pollut ; 157(6): 1831-40, 2009 Jun.
Article in English | MEDLINE | ID: mdl-19232804

ABSTRACT

There are strong drivers to increasingly adopt bioremediation as an effective technique for risk reduction of hydrocarbon impacted soils. Researchers often rely solely on chemical data to assess bioremediation efficiently, without making use of the numerous biological techniques for assessing microbial performance. Where used, laboratory experiments must be effectively extrapolated to the field scale. The aim of this research was to test laboratory derived data and move to the field scale. In this research, the remediation of over thirty hydrocarbon sites was studied in the laboratory using a range of analytical techniques. At elevated concentrations, the rate of degradation was best described by respiration and the total hydrocarbon concentration in soil. The number of bacterial degraders and heterotrophs as well as quantification of the bioavailable fraction allowed an estimation of how bioremediation would progress. The response of microbial biosensors proved a useful predictor of bioremediation in the absence of other microbial data. Field-scale trials on average took three times as long to reach the same endpoint as the laboratory trial. It is essential that practitioners justify the nature and frequency of sampling when managing remediation projects and estimations can be made using laboratory derived data. The value of bioremediation will be realised when those that practice the technology can offer transparent lines of evidence to explain their decisions.


Subject(s)
Hydrocarbons , Soil Microbiology , Soil Pollutants , Bacteria/metabolism , Biodegradation, Environmental , Biosensing Techniques , Colony Count, Microbial , Ecology/methods , Ecosystem , Hydrocarbons/analysis , Soil/analysis , Soil Pollutants/analysis
20.
Mar Pollut Bull ; 58(4): 552-8, 2009 Apr.
Article in English | MEDLINE | ID: mdl-19101704

ABSTRACT

Copper-based antifoulant paints and the sea lice treatment Slice are widely used, and often detectable in the sediments beneath farms where they are administered. Ten-day, whole sediment mesocosm experiments were conducted to examine how increasing sediment concentrations of copper or Slice influenced final water column concentrations of ammonium-nitrogen (NH(4)-N), nitrate+nitrite-nitrogen (NO(X)-N) and phosphate-phosphorus (PO(4)-P) in the presence of the non-target, benthic organisms Corophium volutator and Hediste diversicolor. Nominal sediment concentrations of copper and Slice had significant effects on the resulting concentrations of almost all nutrients examined. The overall trends in nutrient concentrations at the end of the 10-day incubations were highly similar between the trials with either copper or Slice, irrespective of the invertebrate species present. This suggests that nutrient exchange from the experimental sediments was primarily influenced by the direct effect of copper/Slice dose on the sediment microbial community, rather than the indirect effect of reduced bioturbation/irrigation due to increased macrofaunal mortality.


Subject(s)
Copper/analysis , Geologic Sediments/analysis , Pesticides/analysis , Water Pollutants, Chemical/analysis , Amphipoda/physiology , Animals , Polychaeta/physiology , Seawater/analysis
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