clean "." in strain strings

species_data.py

@@ -14,9 +14,11 @@ def clean_string(string):
         cleaned_string = string \
             .replace(" ", "_") \
             .replace("-", "_") \
+            .replace(".", "_") \
             .replace("(", "") \
             .replace(")", "") \
-            .replace("'", "").strip()
+            .replace("'", "")\
+            .strip()
         return cleaned_string
     else:
         return string