[Gallstone ileus, observations on 13 cases].

The authors expose some considerations about clinical features of this unusual condition. Thirteen cases of gallstone ileus are reported. The medium age was 70 years.

Occurrence of Leucocytozoon and Haemoproteus (Apicomplexa, Haemosporina) in Falconiformes and Strigiformes of Italy.

Blood smears from Falconiformes (91 birds of 10 species) and Strigiformes (23 birds of 5 species) captured in Italy, were examined for haematozoa. Leucocytozoon were found in Falco tinnuculus, Buteo buteo, Circus cyaneus, Circus pygargus, Accipiter nisus from Falconiformes and in Strix aluco, from Strigiformes. Haemoproteus were found in Falco tinnuculus and Strix aluco; this latter species harbored mixed infections Leucocytozoon-Haemoproteus.

[Radioactive isotopes in the diagnosis and therapy of tumors].

The Author, after some historical accounts, widely deals with physics and chemistry of the atom that are the necessary presupposition to the knowledge of the mechanisms of action of radio-isotopes. He hence exposes the radio-isotopes applications with special consideration to the action of radiations on the organism and the possibility of diagnosis and therapeutics with radioisotopes in oncology. The Author concludes that radio-isotopes must not be considered separately in the therapeutics of tumours, but as main component of the whole anti-tumour armament (surgical, consentional radiological, chemi-therapeutic) in which the immune-therapeutics is proving itself with fascinating possibilities.

[Immunological problems in oncology (author's transl)].

The Authors, after a view of the problems of immunology, regarding the most recent discoveries, deal with the conclusions about the immunological reactions in research and clinical oncology. Many specific antibodies, formed as a result of the tumor, have been discovered in the field of research. It is impossible to say the same about human tumors and the probable hypothesis are numerous.

The in vitro conversion of a specific molecular form of glucose 6-phosphate dehydrogenase from Musca domestica L.

A nicotinamide adenine dinucleotide phosphate dependent glucose 6-phosphate dehydrogenase (G6PD), belonging to type I of Kamada and Hori's classification, is present on the zymograms of newly emerged males of Musca domestica. It is capable of undergoing tryptic degradation and being thus transformed into a different active enzymatic form, with some of its catalytic properties unchanged, but with different electrophoretic mobility. We show in this paper that this specific G6PD form of gut origin in M.

Multiple forms with glucose 6-phosphate dehydrogenase activity in Musca domestica L. as revealed by electrophoresis on cellulose acetate gel.

Single newly emerged males of Musca domestica, WHO strain, usually show five electrophoretic bands of glucose 6-phosphate dehydrogenase (G6PD) activity. Of these five molecular forms, designated with Roman numerals in order from the origin, we have considered the first three: these have been characterized with respect to their substrate and coenzyme specificity and to their sensitivity to some sulfhydryl inhibitors. The data show band III to be G6P specific, nicotinamide adenine dinucleotide phosphate dependent and to be a type I enzyme according to Kamada and Hori's classification.