Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CONICET-UNLP, Boulevard 120 s/n e/Av.60 y calle 64, 1900 La Plata, Argentina; División Entomología, Museo de La Plata, Universidad Nacional de la Plata (UNLP), Argentina.
Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CONICET-UNLP, Boulevard 120 s/n e/Av.60 y calle 64, 1900 La Plata, Argentina; Facultad de Ciencias Naturales y Museo, UNLP, Argentina.
J Invertebr Pathol. 2020 Nov;177:107504. doi: 10.1016/j.jip.2020.107504. Epub 2020 Nov 17.
En masse inoculations with Paranosema locustae, an intracellular parasite of adipose tissue of grasshoppers and locusts and the only microsporidium registered as a biocontrol agent, were conducted against crowded fourth-instar nymphs of the South American locust Schistocerca cancellata and the grasshoppers Dichroplus schulzi and Ronderosia bergii. Infection did not develop in the locust, but was highly prevalent in the two grasshopper species. We hypothesize that absolute absence of infection in S. cancellata may constitute a case of density-dependent prophylactic resistance, an elevation of the baseline immunity of an organism in order to cope with disease that is prevalent in species exhibiting phase polyphenism.
大规模接种Paranosema locustae，这是一种寄生于蚱蜢和蝗虫脂肪组织的细胞内寄生虫，也是唯一一种被注册为生物防治剂的微孢子虫，针对的是拥挤的南美的蝗 Schistocerca cancellata 的第四龄若虫和草蜢 Dichroplus schulzi 和 Ronderosia bergii。感染在蝗虫中没有发展，但在两种草蜢中非常普遍。我们假设 S. cancellata 中绝对没有感染可能构成一种密度依赖性预防抗性的情况，即生物体的基线免疫力升高，以应对在表现出相多态性的物种中流行的疾病。
