<![CDATA[Water quality plays an important role in maintaining the health and survival of cultured vannamei shrimp (Litopenaeus vannamei). This study aimed to analyze water quality parameters and determine differences in the occurrence of Infectious Myonecrosis Virus (IMNV) between two intensive vannamei shrimp farming companies. The study was conducted in two intensive shrimp farming companies located in North Lombok Regency, West Nusa Tenggara Province. Water quality parameters were observed during the culture period, and the data were analyzed using an independent-samples t-test. The results indicated that water quality conditions were generally suitable for intensive vannamei shrimp culture. However, nitrite concentrations increased when pond siphoning was not performed on time. The independent-samples t-test showed no significant difference in the occurrence of myo virus disease or IMNV associated with water quality between Company A and Company B (0.898 > 0.05). The absence of a significant difference may be related to the geographical proximity of the two companies, which are located within the same regency and obtain seawater from the same coastline. Consequently, both farms may experience similar water-quality conditions and may be exposed to the same disease or virus simultaneously or alternately.]]>
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