Investigation of Anti-SARS-CoV-2 IgG and IgM Antibodies in the Patients with COVID-19 by Three Different ELISA Test Kits.

We examined anti-SARS-CoV-2 IgG and IgM antibodies in 45 serum samples from 26 patients with COVID-19, who were admitted in our hospital by using three different ELISA kits. All patients had pneumonia at admission, and 7 patients required mechanical ventilator support and grouped in severe case. Anti-SARS-CoV-2 IgG and IgM antibodies turned to be partially positive between the 6th and 10th days, more than 84% positive between the 11th and 15th days, and 100% after the 16th day.

Short-term in vitro culturing improves transplantability of type A spermatogonia in rainbow trout (Oncorhynchus mykiss).

Continuous production of sperm within the testes is supported by spermatogonial stem cells capable of both self-renewal and the production of numerous differentiated germ cells. We previously demonstrated that a subpopulation of trout type A spermatogonia transplanted into the body cavity of a recipient embryo incorporated into the genital ridge, where they produced functional gametes within the gonads. Various cell-surface proteins could have played a role in the incorporation of spermatogonia into recipient genital ridges.