[Ectoparasites of the gray rat Rattus norvegicus in steppe and forest steppe zones of Ukraine].

More than 2000 gray rat specimens and 5 burrows have been examined in several regions of steppe and forest-steppe zones of Ukraine. 24,647 representatives of Arthropoda of 39 taxonomic groups have been collected. Species composition of parasitic mites (Gamasida, Trombiculidae, Myobiidae, Listophoridae) and insects (Anoplura, Siphonaptera) has been defined.

[The clinical and pathogenetic role of erythrocyte catalase activity in diphtheria patients].

Cataleptic activity of erythrocytes was studied in 31 diphtheria and 10 quinsy patients versus 10 healthy controls. Inhibition of cataleptic activity in diphtheria directly correlated with growing severity of the disease. Such relationship was not found in quinsy.

[Effects of general anesthesia on the regulation of hydrogen peroxide metabolism in erythrocytes].

Changes in superoxide dismutase (SOD), catalase (C), and peroxidase (P) blood activity, as well as the activity of glucose-6-phosphate dehydrogenase (G-6-PDH), isocitrate dehydrogenase (ICDH), malate dehydrogenase (MDH), and peroxide resistance of erythrocytes (PRE) have been studied in 45 gastroenterologic patients under different types of general anesthesia. A significant increase in G-6-PDH, SOD, K, P activity and an increase in ICDH and MDH activity, as well as a drop in PRE which tends to return to baseline postoperatively have been established during general anesthesia. SOD expressed the greatest intergroup differences.

[A chewing gum with mineral additives].

Finely dispersed hen egg shell was added to a new chewing gum as a mineral component. The studies carried out in 28 schoolchildren have shown that 15 min chewing of this gum results in a marked elevation of salivary Ca levels and in improvement of the hygienic status of the oral cavity. This fact recommends this chewing gum as an additional means for care of the oral cavity for both hygienic purposes and for improving the mineralizing potential of the saliva.