Molecular Detection of Giardia lamblia and Cryptosporidium parvum in Different Water Sources of District Bannu, Khyber Pakhtunkhwa, Province of Pakistan.

Background: Cryptosporidium parvum and Giardia lamblia are intestinal parasites that predominantly causes "waterborne" infections that are transmitted through consumption of contaminated water. Both parasites typically cause an acute short-term infections with selflimiting diarrhea as the main symptom in people with intact immune systems. However, in immunocompromised individuals, the symptoms are particularly severe and might be fatal. Methods: The study was carried out in District Bannu Khyber Pukhtunkhwa, Pakistan for the detection of G. lamblia and C. parvum parasites in drinking water in different villages/localities (Kakki, Jamon Road, Kotka Juma Khan, Sokari, Mandan and Bannu City). Water samples n=75 were collected from different water sources between 1st August 2011 to 30th January 2012. These samples included tap, pond, borewell and hand pump water that were filtrated and residue was subjected to amplify by PCR. Results: Overall prevalence of parasites was 36% (25/75), containing tap 17.64% (9/51) and pond water 75% (6/8), bore well water 41.66% (5/12) and hand pump water 50% (2/4). Similarly over all prevalence rate of tap water for C. parvum was 7.84% (4/51) while for G. lamblia was 9.80% (5/51) positive. The present study revealed that the people of the area should use the cleaned and filtered water. Conclusion: Contamination of water with G. lamblia and C. parvum was found in water sources especially the drinking ones, of District Bannu which need proper water treatment to decontaminate and large scale studies are needed.

Detección de protozoos parásitos entéricos, bacteriófagos de E. coli y organismos indicadores de contaminación en camarones comercializados en el estado Zulia / Detection of enteric protozoa parasites, E. coli bacteriophages and fecal pollution Indicator organisms in shrimp sold in the state of Zulia

Se determinó la presencia de Giardia intestinalis y Cryptospodidium parvum, bacteriófagos de Escherichia coli y organismos indicadores de contaminación (OIC), en muestras de camarones para el consumo humano comercializados en el estado Zulia. Los parásitos se concentraron a partir de sistemas digestivos de pools de camarones por la técnica de formol-éter y se cuantificaron por inmunofluorescencia directa. La concentración de los bacteriófagos de E. coli F+ y los OIC se evaluó por técnicas estándar. En este trabajo se detectó la presencia de G. intestinalis, C. parvum, bacteriófagos y E. coli en camarones comercializados en el estado Zulia que cumplían los criterios de la normativa venezolana de calidad sanitaria e inocuidad. Del total de muestras analizadas el 91,5% fueron positivas para G. intestinalis (promedio: 36,6 quistes/100g), 95,3% para C. parvum (promedio: 32,8 ooquistes/100g), 100% para los bacteriófagos de E coli F+ (promedio de 2,8 x 103 UFP/100 g) y 71,5% para E. coli (promedio de 4,3 x 104 NMP/g). Los resultados obtenidos indican que los camarones pueden convertirse en un vehículo para la transmisión de patógenos al hombre y dejan en evidencia la necesidad de la inclusión de un parámetro parasitológico y viral en el control de la calidad microbiológica de estos productos alimenticios.

The presence of G. intestinalis and C. parvum, E. coli F+ bacteriophages and fecal pollution indicator organisms was determined in shrimp for human consumption marketed in the State of Zulia. Parasites were concentrated from the digestive systems of shrimp pools, detected by formalin-ether and quantified by direct immunofluorescence. E. coli F + bacteriophage and pollution indicator organism concentrations were determined by standard techniques. In this work, G. intestinalis, C. parvum, E. coli F + bacteriophages and E. coli were detected in shrimp for human consumption marketed in the State of Zulia that met the quality criteria of Venezuelan health and safety regulations. 91.5% of the samples analyzed were positive for G. intestinalis (average: 36.6 cyst/100g), 95.3% for C parvum (average: 32.8 oocyst/100g), 100% for E coli F + bacteriophages (average: 2.8 x 103 FPFU/100g) and 71.5% for E. coli (average: 4.3 x 104 MPN/g). Results of this research indicate that shrimp can become a vehicle for transmitting pathogens to humans and demonstrate the need for including a parasitic and viral parameter in microbiological quality control for seafood.

STUDIES ON THE EFFICACY OF DIFFERENT INDUCERS FOR INDUCING IMMUNE INTERFERON FROM HUMAN TONSILUR LYMPHOCYTES / 第二军医大学学报

The efficacy of different inducers used to induce immune interferon (IFN-?)from ionsillar cells of onsillectomized normal children was sfudied.Tonsillar cells were made in suspension of 1?107 cells/ml treated with antibiotics,and cultured for 2-3 days and then supernants were assayed for IFN-r.The results show that cells of individual human tonsil could produce IFN-? spo ntaneously owing to the induction by pharyngeal normal flora.Esculentoside (Es) alone or .pokeweed mitogen (PWM) alone,their combinatian or with other inducers were capable of inducing IFN-?.Among them,PWM was more effective in inducing IFN-? than Es,and its efficacy was similar to that of PWM+ scoppolamine,but higher than that of PWM+C.parvum or PWM+Con A.Mixed lymphocyte culture (MLC) of human tonsils,with or without PWM or Es,could produce IFN-?,but slightly higher titer was obtained with MLC+PWM.The possible reasons for the difference of efficacy of various methods in inducing IFN-? from human tonsillar cells are discussed.