geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Experimental studies on Endamoeba histolytica in the dog


, : Experimental studies on Endamoeba histolytica in the dog. Amer Jour Hyg Sect C 29(2): 89-109

Studies designed to determine whether cysts of E. histolytica formed in the intestine excyst and invade the tissues of the host without leaving the body indicated that such a process of internal infection does not normally occur, although it may be produced under extremely artificial conditions. In another series of expts. 5 of 13 dogs became infected following the ingestion of trophozoites of E. histolytica in a cyst-free medium. In at least 14 out of 22 animals trophozoites passed through the stomach in a viable condition. Trophozoites of this ameba were observed to withstand moderate conc. of HCl in vivo. Data obtained from exptl. inoculation of 16 animals with cysts of E. histolytica showed that excystation occurred both in the ileum and in the large intestine of the dog. Excystation was observed in several animals and the time required to complete the process following ingestion of the cysts ranged from 1.5 to 4.5 hours or longer. No amebae with more than 4 nuclei were observed during the period of metacystic development which in the dog must be very short. Neither an extended incubation period nor chilling is necessary for the excystation of cysts of E. histolytica, but cysts refrigerated for several weeks at about 5[degree]C remained viable.

US$29.90


Other references

Kim S H.; Terry M.E.; Dauwalder M.; Clark G.; Roux S.J., 1987: Production and characterization of monoclonal antibodies against wall proteins of corn. Plant Physiology (Rockville) 83(4 SUPPL): 42

Hermansson, I., 1992: Education proposal for physicians in sparsely populated areas. Nordisk Medicin 107(1): 29-30

Zou-Chao-Xia; Li-Qiang; Liu-Ying-Ying; Wu-Li-Fang; Zhang-Chun-Jing; Fang-Shao-Hong; Zhou-Hong-Bo, 2008: Grx1 overexpression inhibited activation of p38 MAPK signal transduction pathway induced by H2O2 in HEK293T cells. Glutaredoxin1 (Grx1) is an important thiol-disulfide oxidoreductase in the cells, and it plays a crucial role in the maintenance of cellular redox homeostasis and the defense against oxidative stress. In order to study the anti-oxidative mechanis...

Cramm, J.M.; Strating, M.M.H.; Sonneveld, H.M.; Nieboer, A.P., 2013: The Longitudinal Relationship Between Satisfaction with Transitional Care and Social and Emotional Quality of Life Among Chronically Ill Adolescents. This study aimed to identify the relationship between satisfaction with transitional care and quality of life of chronically ill adolescents over time. This longitudinal study included adolescents with type I diabetes, juvenile idiopathic arthriti...

D.A.ostini A.; Marcum J.; Rosenberg R., 1987: The binding of antithrombin to capillary endothelial cells grown in vitro. Thrombosis & Haemostasis 58(1): 150

Bryan, C.S.; Longo, L.D., 2013: Perspective: Teaching and mentoring the history of medicine: an Oslerian perspective. Many predict a takeover (seen by some as hostile, and by others as inadvertent) of professional virtues and values by government and capitalism. One source of professional virtues and values consists of lessons from the history of medicine as taug...

Zhang, Y.; Vuković, L.; Rudack, T.; Han, W.; Schulten, K., 2016: Recognition of Poly-Ubiquitins by the Proteasome through Protein Refolding Guided by Electrostatic and Hydrophobic Interactions. Specificity of protein degradation by cellular proteasomes comes from tetra-ubiquitin recognition. We carry out molecular dynamics simulations to characterize how the ubiquitin receptor Rpn10 recognizes in the 26S proteasome K48-linked tetra-ubiqu...

Bianco, S.; Robuschi, M.; Sestini, P., 1991: Hyperreactivity and bronchial obstruction. The main obstructive components in bronchial asthma and chronic obstructive pulmonary disease (COPD) are discussed. It is underscored that bronchospasm plays a significant role also in COPD, and that it merits specific treatment (beta 2-stimulants...

Whyte, A.; Cavell, E., 2010: A model of altruism. A new biography of Edith Cavell has been published to mark the 95th anniversary of her execution by firing squad.

Gunn, J.M.; Rekola, J.; Hirvonen, J.; Aho, A.J., 2014: Comparison of the osteoconductive properties of three particulate bone fillers in a rabbit model: allograft, calcium carbonate (Biocoral®) and S53P4 bioactive glass. The aim of this study was to compare the osteoconductivity and suitability of three biomaterials used as particulate fillers; S53P4 bioactive glass, allogeneic fresh frozen bone and coral-derived calcium carbonate. Materials were implanted into dr...