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Wyświetlanie 1-8 z 8
Tytuł:
Układ Giardia - żywiciel: zmienność obrazu inwazji
Autorzy:
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2151421.pdf
Data publikacji:
1994
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
interakcje zywiciel-pasozyt
choroby inwazyjne
lamblia
pasozyty zwierzat
Giardia
parazytologia
giardioza
inwazja pasozytnicza
zywiciele
pasozyty czlowieka
Opis:
In man, as well as in many species of vertebrates there exist several populations of Giardia duodenalis group which, though morphologically indistinguishable, show different level of heterogenicity in several characteristics, a. o. in surface antigens, isoenzyme make-up, RFLP, invasiveness for different hosts or pattern of experimental infection. Also the clinical observations in man distinctly suggested that G. intestinalis comprises several different populations. In the course of giardiosis apparent variability in clinical manifestations can be observed. In many patients the infection is symptomless and resolves spontaneously and in some others – variable intensity of symptoms is observed. Most likely both the parasit's characteristics and the host's feature will determine the clinical character of infection. It is well known that in some cases it is the host that responsible for the symptoms of the infection. Thus, for instance, clinical giardiosis links with immunodeficiency, malnutrition or young age. There are also evidences that some Giardia isolates have enhanced potency to provoke the disease of the host. It is considered that the variable pattern of the infection may be related to three different factors in host-parasite relationship: extra- and intrapopulation variability of Giardia isolates, the microenvironmental factors of the host's intestine, and the variable immune response of the host. The author describes data on the two first factors.
Źródło:
Wiadomości Parazytologiczne; 1994, 40, 1; 3-9
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molekularne mechanizmy lekooporności pasożytów
Autorzy:
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2148863.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lekoopornosc
parazytologia
mechanizmy molekularne
pasozyty
Opis:
In spite of the enormous achievements of medical and biological sciences, parasites still constitute important medical and veterinary problem. One of the main obstacles in the treatment and eradication of human and animals parasitic diseases is drug resistance of parasites. This phenomenon has more and more frequently been described both in medical and veterinary practice. The application of numerous molecular biology techniques in modern parasitological laboratories have enabled the investigations of parasites at the DNA level. The results of these studies have revolutionised our knowledge and made possible the recognition of not only the reasons and extent of genetic differentiation of parasites but also the recognition of genetic and molecular mechamisms of drug resistance. The results of many studies showed interspecific, interpopulational, and even intrapopulational heterogeneity of parasites in their sensitivity to antiparasitic drugs. Moreover, it has been found that in various parasites there often exist different molecular bases of the drug resistance. The review concerns different molecular mechanisms of drug resistance in selected parasite taxa (Schistosoma spp., Haemonchus contortus, Leishmania spp., Plasmodium falciparum, Entamoeba histolytica).
Źródło:
Wiadomości Parazytologiczne; 1998, 44, 2; 139-150
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wirusy pasożytniczych pierwotniaków
VIRUSES OF PARASITIC PROTOZOA
Autorzy:
Kasprzak, W.
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2149109.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
wirusy
pierwotniaki
parazytologia
pasozyty
Opis:
The authors present the actual review on several publications concerning the molecular characterizations of the viruses found in parasitic protozoa such as Giardia, Trichomonas, Leishmania and Entamoeba histolytica. All of the RNA viruses observed in parasitic protozoa showed several similarities and did not considerably differ from the viruses found in simple eukaryotic cells; they closely correspond to dsRNA viruses of yeast. The supposition that the protozoan symbionts detected in laboratories transfer to their hosts in natural conditions seemed to be rational, though, there are no evidences that these symbionts are potential pathogens. However, the opinion reiterates that intestinal protozoa (e.g. Entamoeba histolytica) may serve as vectors for HIV or cofactors of HIV infection. The authors point out that irrespective of the potential role of viruses as vectors in the transfection system for parasitic protozoa, the observed viral system constitutes an unusual experimental system to solve the problems of gene expression.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 2; 131-137
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryptosporydioza - parazytoza o typowym uwarunkowaniu środowiskowym
CRYPTOSPORIDIOSIS — A TYPICAL ENVIRONMENTAL PARASITOSIS
Autorzy:
Kasprzak, W.
Majewska, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/2149111.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby inwazyjne
pasozyty zwierzat
kryptosporidia
parazytologia
Cryptosporidium
pasozyty czlowieka
Opis:
The article reviews the problems on epidemiology of cryptosporidiosis and gives a detailed description of the massive waterborne outbreak in Milwaukee (Wisconsin, USA) associated with a break in filtration capacity of a public water supply. The authors emphasize the need for high-quality diagnostic procedures as current coprodiagnostic microscopical techniques seemed to fail to detect Cryptosporidium oocysts.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 2; 149-154
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wodnopochodne epidemie Giardia
WATERBORNE OUTBREAKS OF GIARDIA
Autorzy:
Majewska, A. C.
Kasprzak, W.
Powiązania:
https://bibliotekanauki.pl/articles/2151382.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
lamblia
Giardia
epidemie
parazytologia
pasozyty
epidemiologia
Opis:
The authors present the actual informations on waterborne outbreaks of giardiosis as well as the evidences of Giardia cyst transmission by municipal water supply. In the article a recommendation is given to molecular biology techniques which contributed to the armentarium applied in the modern diagnostics of giardiosis.
Źródło:
Wiadomości Parazytologiczne; 1995, 41, 1; 25-31
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie technik biologii molekularnej w parazytologii: za i przeciw
APPLICATION OF MOLECULAR BIOLOGY TECHNIQUES IN PARASITOLOGY: FOR AND AGAINST
Autorzy:
Majewska, A. C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/2148868.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parazytologia
techniki badawcze
techniki biologii molekularnej
diagnostyka
Opis:
This review deals with possible advantages and disadvantages connected with applying molecular biology techniques in parasitology. It particularly concerns molecular diagnosis and epidemiology, as well as phylogenesis and taxonomy of selected parasite species.
Źródło:
Wiadomości Parazytologiczne; 1998, 44, 2; 181-194
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Źródło i znaczenie genetycznego zróżnicowania populacji pasożytniczych pierwotniaków
SOURCE AND SIGNIFICANCE OF GENETIC POLYMORPHISM OF SELECTED PARASITIC PROTOZOA
Autorzy:
Majewska, A. C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/2148795.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
zroznicowanie genetyczne
Leishmania
Giardia
struktura populacji
pierwotniaki
parazytologia
zroznicowanie gatunkowe
Toxoplasma
populacje zwierzat
pasozyty
Trypanosoma
Cryptosporidium
Opis:
The application of biochemical and molecular techniques in parasitological studies has provided increasing evidences of genetic polymorphism among parasite populations. This review presents possible origins of genetic variation within populations of various protozoan species. Since the mode of reproduction has an important influence on genetic polymorphism within parasite populations these considerations refer mainly to some protozoan parasites which have various life cycles, e.g. Giardia, Trypanosoma, Cryptosporidium, Toxoplasma. Also other factors associated with parasites (such as: transmission and passage history in laboratory conditions; occurrence in different hosts or geographic regions; selective pressure of drugs; competitive interactions between populations) that affect parasite genetic diversity are discussed. However, the number of examined isolates of parasites and genetic markers, assortment of methods, probes, primers and reagents used is also of significance. The significance of genetic variability in parasite populations is still the subject of much interest and controversy. A simple interpretation of such variation is impossible because of the complexity of host-parasite interactions. The knowledge of parasite diversity at the nucleic acids level has continually increased, but a corect interpretation of this phenomenon requires at least the same knowledge of genetic variability in host populations. Nevertheless, genetic variability in protozoan parasites has many important implications, e.g. for taxonomy, epidemiology, control and evolution. Genetic differences within parasite populations might also be associated with phenotypic variability, e.g. virulence, antigenicity, infectivity, drug sensitivity, hostpreference etc.
Źródło:
Wiadomości Parazytologiczne; 1999, 45, 3; 293-307
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryptosporydioza u osób zakażonych HIV
Autorzy:
Majewska, A. C.
Sulima, P.
Werner, A.
Barałkiewicz, G.
Juszczyk, J.
Pieniążek, N.J.
Powiązania:
https://bibliotekanauki.pl/articles/2148749.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
kryptosporydioza
choroby czlowieka
wirus HIV
parazytologia
Opis:
Cryptosporidium parvum is a coccidian parasite that affects millions of people worldwide. Clinical outcome of human cryptosporidiosis differs between immunocompetent and immunodeficient individuals. C. parvum is responsible for causing protracted and life-threatening diarrhea, biliary, and pulmonary infections in immunocompromised persons, especially in patients with AIDS. Though no effective treatment has been found so far, early diagnosis may be useful in controlling the infection. Thirty-eight stool specimens obtained from 35 HIV-positive patients admitted to the Clinic of Infectious Diseases in Poznań, Poland, were examined for the detection of oocysts, coproantigen and DNA of Cryptosporidium using standard microscopic, immunologic and molecular diagnostic methods. The presence of Cryptosporidium was detected in 10 HIV-positive patients. Oocysts, coproantigen and DNA of this parasite were identified solely in one specimen while Cryptosporidium DNA was detected in 8 specimens. Cryptosporidium coproantigen was found only in one sample. Although, the PCR was the most useful technique in the detection of Cryptosporidium in HIV-positive patients it should be noted that PCR has many pitfalls and needs to be carefully controlled to avoid both false positive and false negative results.
Źródło:
Wiadomości Parazytologiczne; 1999, 45, 2; 125-128
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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