i actuall had a similar situation with docs and parasits... i took in 2 whole parasites (hook worms mabe) in glass jar with ethanol (2nd best to formaldehyd) so naturally they discarded the sample, not to mention the umpteen different labs that processed my results. The average rule of thum in the US is that it takes 7 to 10 sample to positively identify it. Has any had experience with strongyoids afer steriod treatment. I aslo have flukes.... STIIL both after doin albendazole and ivernectin for 2 weeks. YES i ended up very sick and may have destroyed alot of vessels with the huge alleric/inflammatory response.