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[Plant smells---important determinants in the behavior and rate of development of ixodid disease vectors].

Experiments with nymphs of Ixodes persulcatus and Dermacentor marginatus have shown that the rate and degree of engorgement, dropping off from the mouse, metamorphosis longevity and weight of emerging imagoes change under plant odour influence. The influence of acetone extract vapours of pepper, poplar buds, linden and aspen was tested. Under the influence of the vapour, acting as an attractant for the adults, engorgement weight of their nymphs and the weight of imagoes emerging from them increased; attractants change the nymph-imago metamorphosis duration as well. Repellent acting odours, as a rule, produce an opposite reaction. The phenomenon of the inversion of the infected D. marginatus reaction to the odour is proved in nymphs. Attractant for naive adult ticks (poplar buds) increased the time of feeding and weight of nymphs in comparison with the control. Just the opposite: nymphs infected with tick-borne encephalitis (TBE) virus produce an opposite reaction--weight decrease under influence of poplar buds as the repellent. Importance of the above phenomena for the ticks distribution and TBE epizootiology is discussed.

Animals↗
PubMed1992

Standardization of the Denver Developmental Screening Test for Armenian children.

To establish the cultural validity of the Denver Developmental Screening Test norms for Armenian children, a convenience sample of 39 children enrolled in an Armenian elementary school were studied. The results indicate the established norms are valid for children of Armenian culture. The test was first administered in English; items were translated into Armenian only in the case of a questionable initial finding. Language, cultural differences, and child rearing practices contributed to deviations from the norms. These differences should be considered when using the Denver Developmental Screening Test with ethnic groups.

Armenia↗
PubMed1992

[Antigenic composition of serum proteins of the Inv system in normal conditions and in patients with hematologic diseases among the Armenian population].

Inv (1) antigen distribution was studied in 568 normal subjects and in 354 hematological patients in the Armenian population. Inv (1) antigen was detected in 16.7% of the normal Armenians studied. The incidence rate of Inv (1) factor does not depend on the distribution of phenotypes of ABO system, rhesus factor (D), and the sex of the subjects investigated. Inv (1) antigen incidence rate in patients with acute leukemia, chronic lymphocytic leukemia, iron deficiency anemia, lymphogranulomatosis, idiopathic thrombocytopenic purpura, autoimmune hemolytic anemia was similar to that in the control, and only patients with chronic myeloid leukemia had significantly decreased levels of Inv (1) antigen: 6.8% as compared to 16.7% in the population.

Adolescent↗