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At least 19 recordsLinked to original sources
PubMed1992

[Nitrate water pollution of drinking water in the Bydgoszcz district].

The study was undertaken to evaluate the degree of drinking water pollution in the towns and countryside of the Bydgoszcz District, supplied by various installations, on the basis of the results of investigations of sanitary-epidemiological stations. Evaluation was done according to the state in 1985 as compared with that of 1981 to establish the eventual dynamics of the changes. The data presented in the tables indicate that the water supplied by the big water lines (public and institutional) does not contain nitrate quantities exceeding the norm (above 10 mg N/dm3). Their presence at a 20 mg N level/dm3 was found only in four (1.5%) lines supplying large state farms. Small installations were much more frequently polluted with nitrates, especially public wells and those of local institutions, a total of 8.8% in towns and as many as 17% in the country, where a tendency to deterioration of this state is also visible in contrast to the towns. Among the plants and institutions supplied by these water sources the situation is most unfavourable in agriculture, schools, educational and food producing and distributing establishments. The nitrate concentration in the analysed water varied in general within the limits of 10-30 mg N/dm3, maximal amounts within 60-200 mg N/dm3, showing an about 50% decrease in the compared time periods. Nitrates occur most frequently and in highest concentrations in water of wells belonging to individual households which supply about 50% of the rural population and about 11% of town dwellers.(ABSTRACT TRUNCATED AT 250 WORDS)

Nitrates↗
PubMed1992

[Experiences with water pollution damage].

Examples of water pollution accidents of different origin are discussed. They serve to illustrate that especially drinking water supply plants must be kept under constant control.

Decontamination↗
PubMed1977

Study on the post-mortem identification of pollutants in the Fish killed by water pollution: detection of arsenic.

Careless Herbicidal aerial spray of a field for weed control and defoliation of cotton before machine picking, resulted in the contamination of an adjoining reservoir, killing large volume of fish. The dead catfish, along with water and Amarantha weed leaves analyzed contained relatively high levels of arsenic concentrations, indicative of arsenic being the probable cause of fish killing. The arsenic absorbed by fish was irreversable and its bioaccumulation continued in the surviving fish though the water arsenic level fell during the following weeks.

Animals↗
PubMed1978

Outbreak of Guillain-Barré syndrome associated with water pollution.

Sixteen cases of Guillain-Barré syndrome occurred in the third week of a diarrhoea epidemic caused by water pollution in EL-Sult, Jordan. Of 30 000 people exposed to polluted water, 5000 developed diarrhoea, 74 typhoid, and 30 infectious hepatitis. Thirteen of the 16 patients with Guillain-Barré syndrome had been mildly affected by diarrhoea 8-24 days before the onset of peripheral neuropathy. Paralysis progressed rapidly, reaching a peak in one to five days, and recovery began three to seven days after the start of the most severe symptoms. All but four patients had recovered completely after one year. Rapid progress of paralysis and a delayed interval between maximum weakness and start of recovery were both associated with poor prognosis.

Adolescent↗
PubMed1975

[Chronic arsenic water pollution in the Republic of Argentina].

Arsenical pollution of water supplies is a chronic problem of great medical, social and sanitary importance in Argentina. The well-known cutaneous manifestations of chronic arsenical toxicity, palmar and plantar keratoses, melanoderma and multiple epitheliomas are described. The interest which this disease has evoked in the last few years is emphasized when new arsenical areas are discovered with clinical cases of chronic arsenical intoxication. Furthermore it is shown that the high content of arsenic in drinking water may be the determining factor in the incidence of visceral neoplasms. Contrary to classic beliefs, the chronic toxic effects from arsenic may be present in young children but the palmar and plantar keratoses may be absent. The histochemical localization of the arsenic in the skin and its relation to thyroid function and the production of leukoplakia and laryngeal cancer are noted. When one analyses all the recent reports it is evident that patients with chronic arsenical intoxication must now be thoroughly studied bearing in mind the multiple localization of this carcinogenic agent.

Argentina↗
PubMedDate not supplied

Organic-solvent water pollution and low birth weight in Michigan.

This pilot study explored the association between a measure of water pollution caused by benzene or chlorinated solvents and the incidence of low birth weights for white residents of Michigan counties. A positive relationship between water pollution by these contaminants and the per cent of low-weight births (less than 2,500 grams, or about 5.5 pounds) resulted despite controls for the incidence of teenaged childbearing, infrequent prenatal care, and mean household income from wages or salaries. Water pollution showed an association with the incidence of low birth weight that was as strong as that between low birth weight and low prenatal care. While correlation cannot prove causation, the finding suggests that impure water may impair fetal growth in Michigan.

Adolescent↗
PubMed1979

Comparison of antibodies in marine fish from clean and polluted waters of the New York Bight: relative levels against 36 bacteria.

Fish from polluted waters are subject to increased prevalence of disease. Because they respond to bacterial pathogens by producing serum antibodies, it was possible to construct a seasonal serological record in three fish species from clean and polluted waters of the New York Bight. Antibody levels were determined by testing sera for agglutinating activity against 36 strains of bacteria. Evaluation of 5,100 antibody titrations showed the following. During warm months, summer flounder (Paralichthys dentatus) from the polluted area had significantly higher antibody levels and antibody to a greater diversity of bacteria than fish from the unpolluted area. Weakfish (Cynoscion regalis) from the same polluted area shared with summer flounder raised titers to many bacteria. The greatest proportion of raised titers was against Vibrio species, although prominent titers were also seen against Aeromonas salmonicida and Haemophilus piscium, bacteria usually associated with diseases in freshwater but not marine fish. Differences between polluted and clean waters were not as evident in winter flounder (Pseudopleuronectes americanus) during cold months. This could be due, in part, to reduced antibody production at colder temperatures. The data illustrate the usefulness of the serum antibody record in identifying environmental exposure to bacteria in marine fish and indicate that the polluted New York Bight apex has increased levels and diversity of bacteria during warm months.

Animals↗
PubMed1979

The relationship between rainfall and well water pollution in a West African (Gambian) village.

Water pollution was monitored in six Gambian village wells over a period of 8 months spanning the 5-month monomodal rains and the pre- and post-rains dry periods. Faecal coliform (FC) and faecal streptococci (FS) counts were high throughout and there was a massive increase associated with the onset of the rains, maximum counts exceeding 5 x 10(5)/100 ml. This pattern was largely sustained throughout the rainy season. Some individual variations in patterns of pollution could be ascribed to well design, in particular lining of the shaft, but no well was protected from the seasonal increase in faecal pollution. The source of the increased pollution appeared to be a flushing in of faecal material of indeterminate or mixed human and animal origin, probably over considerable distances. Peaks of pollution not associated with rainfall episodes could have resulted from the practice of communal laundering in the near vicinity of the wells. Specific pathogens including Salmonella spp. were isolated only intermittently. Attention has been drawn to a problem complicating the standard method for assessing FC counts.

Animals↗
PubMedDate not supplied

Water pollution and diseases in fish (an epizootiologic survey).

Three watersheds, varying from highly polluted or moderately polluted to essentially pollution-free, were surveyed to determine the frequency of fish disease. Over a five year period, it was found that a relationship existed between the level of pollution and frequency of disease. The occurrence rates of microbial and oncogenic diseases increased similarly in relation to increases in pollution in the waters. Since the water systems studied provide recreational opportunities for man, it is suggested that catching and subsequent ingesting of diseased fish from these waters present a health hazard.

Animals↗