Demographic and clinical characteristics of refugees seeking primary healthcare services in Greece in the period 2015-2016: a descriptive study.

Background: In 2015-2016, more than a million refugees entered Greece. Along with other organizations, PRAKSIS, a local non-governmental organization, deployed mobile medical units on three islands and in temporary settlements in Athens. Methods: This is a descriptive cross-sectional study aimed at analysing the demographic and clinical characteristics of the population (n=6688) that received services from PRAKSIS between October 2015 and June 2016 in different locations (islands of Samos, Kos and Leros in the southeastern Aegean Sea and on the mainland at Athens-Piraeus Port Gate E) before and after the closure of European borders in March 2016. Results: The majority (88%) of the population came from Syria, Afghanistan and Iraq. Among them, 53% were women and children. Infectious diseases decreased as the population moved from the islands to the Athens-Piraeus Port, while all other disease categories increased in relative frequency, the difference being statistically significant (p<0.05). Among all consultations, dental and oral cavity health complaints also increased in the Athens-Piraeus Port, but failed to reach statistical significance (p=0.11). Referrals from the mobile health units to specialist care rose from 4.2% of all patients clinically examined on the islands to 9.9% in the Athens-Piraeus Port, and the difference was statistically significant (p<0.05). Conclusions: More research and systematic data collection are needed to inform appropriate policies for the humanitarian challenges posed by the recent refugee and migrant waves in Europe.

Sertoli cell proliferation in the fetal and neonatal rat testis: a continuous phenomenon?

Sertoli cell population kinetics, as evidenced by semi-quantitative immunolabeling for proliferating cell nuclear antigen (PCNA) and Ki-67, in developing Wistar rat male gonads of embryos and neonates [14.5 days post conception (dpc)-7 days post partum (dpp)], was investigated. Throughout the examined period a gradual increase of immunolabeled Sertoli cell number, associated with intense mitotic activity, was observed. PCNA labeling index of Sertoli cells increased from 66.67 (at 14.5 dpc) to 89.74 (at 18.5 dpc) and then dropped to 75.24 (at 20.5 dpc). At birth, the percentage of PCNA immunoreactive Sertoli cells reached 98.70% and remained high thereafter, attaining a peak value of 99.90% at 7 dpp. The percentage of Ki-67 immunoreactive Sertoli cells in the fetal testis increased from E14.5 (43.95%) to E20.5 (77.40%). The proliferation rate did not alter considerably in the neonatal testis until 5 dpp. At this point, a significant increase of the Ki-67 labeling index was observed and a peak value of 95.76% was reached at 7 dpp. The pattern of Sertoli cell proliferation with age and the establishment of the final Sertoli cell number in vivo established in the present study was compared to the results from earlier investigations reported in the literature and the observed fluctuation of dividing cell numbers, associated with immunolabeling results throughout the examined period, complements and extends existing data. An appraisal of the timing of Sertoli cell proliferation in other species, namely mouse and man, is presented. The current investigation may be useful in evaluating the potential influence of factors interfering with normal mitotic activity of Sertoli cells, including cell selection mechanisms, such as apoptosis, senescence, DNA repair and hormonal/paracrine growth modulation.

Evaluation of immunohistochemical markers of germ cells' proliferation in the developing rat testis: a comparative study.

Germ cells' proliferation during testicular organogenesis in Wistar rat embryos and neonates [14.5, 18.5, 20.5 days post conception (dpc), birth (day 0), 1, 3, 5, 7 days post partum (dpp)] was evaluated via immunohistochemistry, using the PCNA and Ki-67 nuclear antibodies. Estimation of the reactive/total cell ratio, per visual field [labeIing index (LI)] was achieved using the Image Pro Plus Software. Immunostaining of the fetal testis, with both antibodies, revealed increasing germ cells' numbers between 14.5 dpc and birth. From birth onwards, a sharp decline of germ cells' population was observed in the first 3 days of postnatal life. Then, a transient increase of the LI, between 3 and 5 dpp, was noted. Afterwards, proliferation of germ cells ceased. These results indicate that, during fetal and neonatal life, two peaks of proliferative activity of germ cells are noticed. Following estimation of the LI for both PCNA and Ki-67, a prominent labeling for the first antibody was observed throughout the examined period. Ki-67 staining follows a similar pattern, showing, however, significant fluctuation in the obtained values, in comparison to PCNA. The significant differences observed don't seem to be simply a result of the different half lives of the two markers, but rather a consequence of additional underlying cellular activity associated with PCNA, such as DNA repair.