Lopes Rogério B, Alves Sérgio B
Departamento de Entomologia, Fitopatologia e Zoologia Agrícola, ESALQ-USP, CP 9, 13418-900 Piracicaba-SP, Brazil.
J Invertebr Pathol. 2005 Mar;88(3):261-4. doi: 10.1016/j.jip.2005.01.010. Epub 2005 Feb 25.
Gregarines are enteric parasites of invertebrates but little is known about the negative effects of this parasitism on host species. The present study evaluates the influence of the parasitism of Gregarina sp. on the survival of Blattella germanica and methods for elimination of gregarine infection in laboratory rearing systems. Insects were dissected and the infection was detected in 80% of a sample of 50 adults. Diseased cockroaches had swollen abdomens, slower movement at high incidences of the protozoan, and short antennas. Dead cockroaches showed darkened body and putrid smell, indicating septicaemia. Infected insects were more susceptible than healthy cockroaches when treated with Metarhizium anisopliae and triflumuron.
簇虫是无脊椎动物的肠道寄生虫，但对于这种寄生现象对宿主物种的负面影响知之甚少。本研究评估了簇虫属（Gregarina sp.）的寄生对德国小蠊生存的影响以及在实验室饲养系统中消除簇虫感染的方法。解剖昆虫后，在50只成年个体的样本中有80%检测到感染。患病的蟑螂腹部肿胀，原生动物高发时行动迟缓，触角短小。死亡的蟑螂身体变黑且有腐臭味，表明发生了败血症。在用绿僵菌和氟虫脲处理时，受感染的昆虫比健康蟑螂更易受影响。
