Development of water safety plan models for water refilling stations in the Philippines

OBJECTIVES: The aim of the project is to develop water safety plan (WSP) guidelines specific for water refilling station (WRS) operators. The guidelines will serve as model for future formulation of WSP among WRS across the country. METHODS: A criteria was developed for selecting WRS. Site visits were initially done along with the selection of eight (8) water refilling stations from pre-identified areas across the country. The operators of the selected WRS together wih their respective local sanitary inspectors underwent a workshop where they were trained and guided on the step-by-step process of devising a WSP. Coaching and mentoring was then conducted for the improvement of the draft WSPs. A guideline manual on how to develop WSPs for WRS was drafted to serve as reference for other WRS in the country. RESULTS: The study developed a WSP model specifically made for WRS setting. Eight (8) final drafts of WSP were also accomplished. WRS operators and local sanitary inspectors were trained on how to develop WSP which will support and facilitate appropriate implementation of these functional WSPs.CONCLUSION: The formulation of WSPs among WRS ensures delivery of safe drinking-water among its consumers. It serves as an initial step in realizing the vision of DOH of institutionalizing WSPs among all water utilities in the country. The guidelines developed will be a useful tool for other WRS in the country for preparing their own WSPs.

Cadmium concentration in brown and polished rice from selected farms in Barangay Real, Calamba City and its potential non-cancer health risk in adult population

OBJECTIVES: This study was conducted to determine the cadmium (Cd) concentration in brown and polished rice collected from the 9 farms in Barangay Real, Calamba City. This study also assessed the non-cancer health risk to adults (?20 years old) of long-term consumption of rice with Cd using the non-cancer hazard quotient (NHQ). METHODS: Rice grains with hull were collected in November-December 2013. Both rice types were analyzed for Cd using a graphite furnace atomic absorption spectrophotometer (GFAAS). The NHQ was calculated by dividing the estimated daily intake of Cd via rice consumption by the oral reference dose (RfD) for Cd.RESULTS: Mean Cd concentrations in brown and polished rice collected from the 9 farms in Barangay Real ranged from 0.0062 to 0.0725 mg/kg and 0.0047 to 0.0778 mg/kg, respectively. The NHQ values of Cd in both rice types were less than 1.0 for adults (?20 years old). CONCLUSION: Cd concentrations in brown and polished rice from the 9 farms did not exceed the 0.4 mg/kg maximum allowable Cd concentration in rice set by FAO/WHO. Since the NHQ did not exceed 1.0, long-term exposure to Cd through consumption of brown and polished rice from these farms is unlikely to cause non-cancer health effects in adults (?20 years old). It is unlikely for adults to develop kidney diseases such as tubular proteinuria, decreased glomerular filtration rates, and itai-itai disease.

Carcinogenic health risk of arsenic in five commercially important fish from Laguna de Bay, Philippines

OBJECTIVE: This paper examines the potential carcinogenic risk to human health associated with arsenic levels in five commercially important fish products from Laguna de Bay.METHODS: Fish samples were collected in eight sampling stations in three major areas of the lake during the dry and wet seasons.  Coordinates of sampling locations were recorded using Global Positioning System and plotted in Geographic Information System digital maps. Analysis of arsenic was conducted using Atomic Absorption Spectrophotometer.RESULTS: The highest life time cancer risk for arsenic was computed for tilapia from sampling station 2B during the dry season with risk value of 8.51x10-5 or about 85 excess cancer cases per 1,000,000 populations. Calculated cancer risks showed seasonal variations that were distinct among the five fish species. Excess life time cancer risks associated with fish consumption during dry season showed the following order of magnitude: Tilapia > Bighead carp > Kanduli >Bangus > Dalag. For wet season, the order of magnitude was: Bighead carp > Bangus > Kanduli >Tilapia > Dalag. Correlation analyses showed that fish mean standard size do not have significant effect on the levels of arsenic in fish samples for both dry and wet seasons.CONCLUSION: This study concludes from the point of view of disease prevention that long-term consumption of five commercially important fish species from Laguna de Bay may cause significant carcinogenic health risk.

Partnership for health development through the field practice

This article describes the partnership between the College of Public Health, University of the Philippines Manila and the province of Laguna in the context of implementation of the field practice course. This partnership paved the way for the development and implementation of projects in seven field practice sites. Projects concentrated mainly on improving quality of data and health information system, development of educational materials, and addressing health problems such as tuberculosis, hypertension and rabies. After the implementation of the various activities, there is a need for both parties (the College of Public Health and the Provincial Health Office of Laguna) to monitor and evaluate if projects have been sustained. Moreover, successful projects must also be fully documented which can serve as models for other areas in the province of Laguna.

Health risk assessment of heavy metals in Manila catfish (Arius dispar) from Laguna Lake

OBJECTIVE: The main objective of this study is to provide an assessment of the risks to human health associated with the exposure to heavy metal bioaccumulation in Manila Catfish (Arius dispar) from Laguna Lake. METHODS: Manila Catfish (common name Kanduli) samples were collected in eight sampling stations in three major areas of the lake during the dry and wet seasons. Dry season samples were collected from May to June 2010 and wet season samples from September to November 2010. Coordinates of sampling locations were recorded using Global Positioning System to facilitate re-sampling activities and ensured that subsequent samples for the wet season were collected in the area as that of the wet season samples. Heavy metals analyses for cadmium, lead, arsenic, and chromium were conducted using Atomic Absorption Spectrophotometer and Mercury Analyzer for mercury. Estimates of health risks associated with Kanduli consumption were estimated based on non-carcinogenic health effects of heavy metals. RESULTS: Non-carcinogenic Health Quotient (NHQ) values of the five heavy metals showed that lead is the most significant pollutant of concern in terms of adverse health effects from risks associated with Kanduli consumption from the lake. CONCLUSION: From the point of view of disease prevention and control, long term consumption of Kanduli from Laguna Lake is expected to increase health risk due to lead contamination.