The artificial infection experiment showed that 80 percent of strains (8/10) were highly virulent and the disease was easily reproduced by subcutaneous, intramuscular or webfoot injection.
人工感染试验表明,80%(8/10)菌株毒力,皮下、肌肉、足蹼3种途径均易制该病;
The artificial infection experiment showed that 80 percent of strains (8/10) were highly virulent and the disease was easily reproduced by subcutaneous, intramuscular or webfoot injection.
人工感染试验表明,80%(8/10)菌株毒力,皮下、肌肉、足蹼3种途径均易制该病;
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