However , he was having problem breeding those hamsters in captivity , and had difficulty also getting regular shipments of Chinese hamsters from China .
Leishmaniasis was a regional problem and it was common to infect Chinese hamsters as a model organism to study the disease .
He was having problem breeding those hamsters in captivity , and had difficulty also getting regular shipments of Chinese hamsters from China .
Leishmaniasis was a regional problem and it was common to infect Chinese hamsters as a model organism to study the disease .