Hiện trạng nuôi và sử dụng kháng sinh cho tôm nuôi trên địa bàn tỉnh Quảng Ninh

The recent rapid growth of the shrimp production in Vietnam has linked with negative impacts inducing environmental, socio-economic and food safety concerns. The problem has been compounded by disease outbreaks due to viral and bacterial pathogens. Use of drugs,  particularly  antibiotics  in  the  shrimp  rearing  systems  for  control  of  diseases  has become a major concern. In this context a study was undertaken to understand the pattern of antibiotics usage in Quang Ninh, a major shrimp farming province in the North. Thirty shrimp farms comprising the three types of farming systems, viz. extensive, semi-intensive and intensive (10 farms for each type), were investigated. Results revealed that at least 12 veterinary drugs containing 8 different antibiotics (ampicillin, streptomycin, oxytetracyclin, norfloxacin,  enrofloxacin,  oxolinic  acid,  rifamicin  and  phyto-antibiotic)  were  used  by  the farmers. Out of the 30 farms surveyed, 25 farms used veterinary drugs containing one or more  of  the  8  antibiotics  as  listed  above.  The  most  widely  used  antibiotics  were norfloxacin, enrofloxacin, oxolinic acid (quinolon group). The drugs were sold by primary agents (agent  I)  and  secondary  agents (agent II).  Most of the products were sold by the primary agents from Chinese companies (62.5%), the rest being other products produced by joint-ventures in Vietnam. The drugs were sold through two channels, either directly to farmers or through secondary agents.