56 results about "Giardia" patented technology

A method for stabilizing and removing Cryptosporidium oocysts or Giardia cysts from water. The method comprises adding chitosan, a salt or solution of chitosan to water containing Cryptosporidium oocysts or Giardia cysts and a halogenating agent. The method may also include adding a secondary polyelectrolyte flocculant to the water. The resulting flocs are filtered to remove the Cryptosporidium oocysts or Giardia cysts.

The invention discloses a combined processing technology for slightly polluted raw water. The raw material water firstly enters into a first ozone contact tank for pre-ozonation, then enters into a flocculation sedimentation tank for sedimentation treatment, after sedimentation, the water enters into a secondary ozone contact tank for ozonation decomposition, then enters into a carbon sand filtering tank for filtering, the filtered water enters into a membrane processing system, the membrane-processed water enters into a clean water tank for dispatching and storing and are disinfected in the clean water tank by adding chlorine, and the water enters into a suction well and is conveyed to a water distribution network via a pump set in a clean water pump house. The combined processing technology of the invention has the advantages that: the finished water coming from the processed slightly polluted raw water can not only be guaranteed to reach the sanitary standard for drinking water, but also meet higher requirements in some indexes, and is eliminated in microbial overweight risk and effectively removed in humic acid and cryptosporidium and giardia. Additionally , compared with the prior art, the combined processing technology combined with advanced treatment process helps to saves land occupations of a sand filtering tank and a disinfection contact tank and enable water quality upgrading construction of an existing water factory with a compact field to be implemented.

Raman scattering of radiation applied to a water sample is used to assess occurrence of a pathogen in the sample. The method is useful for detecting pathogens that are difficult to detect using other methods, such as protozoa. Examples of organisms that can be detected in water samples using these methods include protozoa of the genus Cryptosporidium and the genus Giardia. The methods described herein have important applications, such as for detection of Cryptosporidium organisms in municipal water systems.

The invention discloses a sampling filtering bag for cryptospsridium and giardia detection in water and belongs to the field of water quality detection. The structure comprises a shell and filtering paper, wherein the filtering paper is arranged in the shell; a water inlet and a water outlet are formed in the two ends of the shell. The sampling filtering bag is characterized in that the shell is composed of an upper filtering cup and a lower filtering cup; the open end of the upper filtering cup is in butt joint with the open end of the lower filtering cup, and the open end of the upper filtering cup and the open end of the lower filtering cup are sealed by a sealing piece; the water inlet is formed in the top end of the upper filtering cup and the water outlet is formed in the bottom end of the lower filtering cup; the filtering paper is arranged between the open end of the upper filtering cup and the open end of the lower filtering cup. With the adoption of the sampling filtering bag disclosed by the invention, the detection cost can be greatly reduced and the detection recovery rate is improved; the sampling filtering bag has very good popularization and application values.

The invention relates to a filtration and concentration method for improving the detection recovery rate of cryptosporidium and giardia in the technical field of water environmental water quality monitoring. The method comprises the following steps: sampling and filtering; adding elution; ultrasound oscillation and centrifugal treatment; carrying out stained preparation by sequentially adopting animmunomagnetic separation method after completing the centrifugal treatment; and then counting by a fluorescence microscope, and making statistics for the recovery rate. The method improves certain operation steps in the filtration and concentration stages, so as to achieve the purposes of reducing the detection cost of the cryptosporidium and giardia and improving the recovery rate.

The present invention relates to a giardia cyst in water and a cryptosporidium oocyst checking method which belonging to the detection technique field, the giardia and the cryptosporidium in water are detected by the combined-dyeing of haematein and intensified kinyoun after the filtration by microporous membrane and the gradient separation by acetic ether and formalin in a ratio of 10:1. The background complexity of the following microscopic examination is alleviated by membrane filtering the water sample and the giardia and the cryptosporidium are separately dyed by the combined-dyeing of haematein and intensified kinyoun. The invention alleviates the impurity interference in the background in traditional giardia and cryptosporidium detecting method and improves the microscopic examing confirmation accuracy of the morphological and structural features.

A continuous flow centrifuge adapted with an insert of glass beads, sand or the like is used to concentrate cysts of microorganisms such as giardia or cryptosporidium from large volumes of water. The apparatus and methods are useful for the detection of contaminating microoorganisms in groundwater and public drinking water.

The invention relates to a method for estimation of bacterial number in water by particle count in water, and the method belongs to the fields of drinking water processing and sanitation. First, for drinking water with turbidity lower than 1NTU, surface water in rivers and lakes, underground water, and industrial water with turbidity lower than 0.5NTU, a particle calculating instrument is used to determine particle count in certain particle size scopes, and determine bacteria number simultaneously; a certain amount of data is accumulated to satisfy statistical requirement after a plurality of detections, and function relationship between bacterial number and particle count in the certain particle size scope is established; and the function relationship is used to determine bacterial number in water from particle count in the certain particle size scope which is determined by the particle calculating instrument. The estimation method in the invention is simple and fast, can be used for on-line measurement, can determine conventional microorganism indexes such as the total number of bacterium colony, the total number of coliform group bacteria and the like, and can be used for determination of specific microbes such as cryptosporidium, giardia and the like.

The invention relates to the field of public drinking water hygienic security detection and provides a filtering recovery device related to cryptosporidium and giardia for solving the problem that theexisting device for detecting the cryptosporidium and giardia is complicated in detection programs and high in detection cost and a system thereof. The recovery device comprises a left filtering assembly, a right filtering assembly and a filter element, wherein the left filtering assembly comprises a water sample barrel, a water sample peristaltic pump, a left filter cup and a washing liquor collection barrel; a water sample inlet hole and a left filter cup exhaust hole are formed in the top of the left filter cup, and a washing liquor drain hole is formed at the bottom of the left filter cup; the right filtering assembly comprises a washing liquor barrel, a washing liquor peristaltic pump, a right filter cup and a water sample collection barrel; a washing liquor inlet hole and a right filter cup exhaust hole are formed in the top of the right filter cup, and a water sample collection hole is formed in the bottom of the right filter cup; solenoid valves are arranged at the previous holes; the filter element is fixedly arranged between the left filter cup and the right filter cup; the pore size of filter paper at the filter element is less than overall dimensions of the cryptosporidium and giardia.

The invention discloses a method for preparing a filter medium used for removing giardia and cryptosporidium in water. The method comprises the following steps: a) mixing raw materials containing ultra-high molecular weight polyethylene, activated carbon and diatomite in powder, wherein the weight ratio of the ultra-high molecular weight polyethylene, the activated carbon and the diatomite in powder is 100-300:50-100:100-350; and b) pressing, sintering and cooling mixture obtained in the step a) in a mould. Compared with the prior art, the invention has the advantages that the provided technical scheme can remove the giardia and the cryptosporidium in the water, has the removal rate reaching over 99.5 percent so as to achieve the aim of improving the water quality, and has simple method, low cost and quick response.

The invention provides an immunofluorecence technique based method for evaluating activities of cryptosporidium parvum and giardia. The method has the following beneficial effects: the accurate, quick, simple, convenient and low-cost high throughput immunofluorecence assay technique is established and is used for evaluating the activities of cryptosporidium parvum and giardia in the ultraviolet (UV) disinfectant fluid; evaluation of the activities of cryptosporidium parvum and giardia in the UV irradiated water is realized by mainly carrying out competitive immunobinding on anti-pyrimidine-dimer (TDs) monoclonal antibodies and the TDs, taking fluorescein isothiocyanate as a marker and immunoglobulin (IgG) as a fluorescent substrate and binding 4',6-diamidino-2-phenylindole, dihydrochloride (DAPI); compared with the fluorescent staining method for evaluating the effect of UV on inactivating cryptosporidium parvum and giardia, the method provided by the invention has such excellent characteristics as strong specificity, high sensitivity and low professional operation requirements; and the cryptosporidium parvum and giardia activity evaluation method system is perfected by binding the method provided by the invention with the fluorescent staining method and other methods, and the method provided by the invention can be widely applied to the fields such as water quality monitoring, disease control and epidemic prevention and the like.

A transcriptional activator of T. gondii is provided which comprises the tetracycline repressor (TetR) operatively linked to a transacting factor of T. gondii. Strains of T. gondii transformed with a vector containing such a transactivator may be used to prepare vaccine compositions or to identify essential genes in the parasite. The system provided may be useful in other Apicomplexan species such as Plasmodium falciparum, Plasmodium vivax, Plasmodium berghei, Plasmodium yoelii, Plasmodium knowlesi, Trypanosoma brucei, Entamoeba histolytica, and Giardia lambia.

The present invention is directed to the recovery of bacteria and microparasites, particularly Cryptosporidium and Giardia, from water samples by filtration through a mixed cellulose ester membrane, partial dissolution of said membrane with methanol followed by completion in the presence of acetone, and purification and concentration using glass beads as a secondary confinement matrix.

The present invention relates to the provision of polymers that are selected to have either; surface properties that allow protozoa, in particular Cryptosporidium and Giardia, to bind to the polymer; or have surface properties that are repellent to the binding of these protozoa. Methods for identifying suitable polymers are provided. Products comprising, consisting of or coated with the polymers of the present invention are also provided, as well as methods of treating or monitoring water employing polymers of the present invention.

The invention discloses a drug containing sustained-release ornidazole drug and used for treating infections of trichmonad, amoeba, giardia and anaerobic organism in gynecopathy as well as the preparation method thereof. The drug aims to provide a sustained-release ornidazole dropping pill formulation which has excellent curative effect, low toxic and side effects, broad-spectrum antibacterium, safer use, low frequency of drug taking and long effective hours and is prepared by adopting the solid dispersion technology, thereby thoroughly changing the defects existing in conventional oral formulations from the drug structure. The sustained-release ornidazole dropping pill adopts ornidazole as the ingredient and is prepared jointly with the medicinal carrier used as the stroma.