The impact of wipe sampling variables on method performance associated with indoor pesticide misuse and highly contaminated areas.

Pesticide misuse incidents in residential indoor areas are typically associated with misapplications that are inconsistent with the label directions of the product. Surface wipe sampling and analysis procedures are relied upon to evaluate the extent of indoor contamination and the remediation efforts successfully. In general, surface wipe sampling procedures are widely varied, which can complicate the comparison of the results and data interpretation. Wipe sampling parameters were studied for the insecticides malathion and carbaryl. The parameters evaluated include wipe media, wetting solvents, composite sampling, surface concentration, and the influence of differing product formulations. Porous and nonporous surfaces tested include vinyl tile, plywood and painted drywall (porous/permeable) and stainless steel and glass (nonporous/impermeable). Specific wipe materials included pre-packaged sterile-cotton gauze, pre-cleaned cotton twill, cotton balls, and a pre-packaged, pre-wetted wipe. Commercially available insecticide formulations were tested, and the results were compared to surfaces fortified with neat analytes to determine surface recovery results (efficiency). A sampling procedure to measure pesticide residues was developed, and variables associated with the sampling methods were evaluated to clarify how estimations of surface residues are impacted. Malathion recoveries were 73-86% for twill and pre-wetted, pre-packaged isopropanol wipes on nonporous materials. Malathion formulations ranged from 78 to 124% for pre-wetted, pre-packaged isopropanol wipes and cotton gauze wipes on nonporous materials. Carbaryl and carbaryl formulation recoveries were 82-115% and 77-110%, respectively, on nonporous surfaces for all tested wipe materials. While not every wipe sampling variable could be tested, the collected information from this study may be useful and applied to sampling plans for classes of chemicals with similar physicochemical properties.

Mental health in older adult recipients of primary care services: is depression the key issue? Identification, treatment and the general practitioner.

OBJECTIVES: Mental health services for older people in primary care are relatively underdeveloped. This study has sought to determine the nature and extent of mental health problems in older people presenting to primary care and to compare this with the detection and management of mental health problems by the primary health care team (PHCT). METHOD: Participants were patients aged 65 years and above attending a representative inner city general practice. Screening tools included the General Health Questionnaire (GHQ-28), Hospital Anxiety and Depression Scale (HADS), Mini Mental State Examination (MMSE). The PHCT used a brief checklist to rate participants for the presence of mental health problems. Follow-up interviews using the Geriatric Mental State (GMSA), Cambridge Examination for Mental Disorders in the Elderly (CAMDEX)-cognitive subscale (CAMCOG), National Adult Reading Test (NART), were carried out. RESULTS: A high level of psychological morbidity was identified at screening (48.1%). There was a considerable degree of agreement between the HADS and GMSA, and the MMSE and GMSA at follow-up. Agreement rates between the PHCT and initial screening tools were low suggesting under-recognition of mental health problems at primary care level by the PHCT. Contributory factors included: short consultation times with a concentration on physical symptoms; few patients presenting explicitly with mental health problems; few decisions to treat or refer patients; and the general practitioners tended to monitor, or defer decisions. CONCLUSIONS: This study found lower levels of severe mental health problems, especially depression, than reported elsewhere, but higher prevalence of psychological distress. High levels of physical and mental health co-morbidity were found. These findings suggest that planning for primary care services needs to adopt a flexible assessment model. The development of effective, time-limited protocols and screening tools to assist the PHCT in improving their identification rates is recommended. This needs to be supported by the availability of appropriate treatments for the psychological distress.