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Table 1 Summary of the localization of Neorickettsia in adult Plagiorchis elegans trematodes as detected by transmission electron microscopy (HPF/FS fixation), immunohistochemistry (IHC) or immunofluorescence (IF)

From: Ultrastructure and localization of Neorickettsia in adult digenean trematodes provides novel insights into helminth-endobacteria interaction

Body parts Endobacteria localization Remarks
HPF/FS IHC IF
Body wall
 Peripheral tegument + ++ ++ Density-dependent on the location of the tegument
 Inner tegument, subtegumentary perikaryon + + ++  
 Parenchyma + + +  
Digestive system
 Oral sucker na + +  
 Esophagus na + +  
 Ventral sucker na + +  
 Proximal caecum ++ +++ +++  
 Distal caecum ++ +++ +++  
Reproductive system
 Seminal vesicle na na ++  
 Ootype na ++ ++  
 Ovary na + +  
 Vitelline glands + ++ Mostly single bacteria
 Uterus  
 Eggs + + ++ Mostly single bacteria
 Vas efferens + + +  
 Testis ++ ++  
 Spermatogonia na +  
 Spermatocytes na +  
 Mehlis’ gland na +++ +++  
  1. Key: – not detected; + sometimes single endobacteria; ++ usually a few endobacteria; +++ many endobacteria, sometimes in high density
  2. na not applicable/examined