Sperm quality changes in survivors of severe burns.

Severe thermal injury occurs frequently, especially in the low-income countries of the world, where they account for a substantial mortality and a wide range of devastating morbidity. Almost all systems of the body are affected, including the cardiovascular, immune, and reproductive systems. A number of studies have shown that people with severe burns may develop impaired spermatogenesis and testicular damage. However, if we consider the many systems that are negatively affected by burns, the effects on the reproductive system are among the least investigated and are therefore poorly understood. We delineated sperm quality changes in 20 men recovering from severe burn injury. They submitted semen at monthly intervals for analysis over a fourmonth period. Our results show that these subjects had significantly lower total sperm counts than normal for their age range. Sperm counts were 20 million/ml or less in half of the study population with a mean of 26.58 ± 7.52 m/ml. Progressive motility was even more severely affected; the score was less than 20% in more than half of the patients, with a mean of 27.74 ± 7.64. Though abnormal sperm rates were within the normal range, in many of the patients 80% of abnormal cells had swollen, oblong and round heads. Cells with tail anomalies made up the rest. Our findings suggest that severe burns cause significant reduction of sperm density and motility. They also cause specific head abnormalities in the cells produced. Such sperm is now known to have very poor fertilization potential.