{Reference Type}: Journal Article {Title}: Tapeworm Infection Diagnosed after Campylobacter jejuni-induced Enteritis. {Author}: Ozaka S;Soma R;Takahashi H;Shimomori Y;Fukuda M;Tsutsumi K;Hirashita Y;Fukuda K;Ogawa R;Mizukami K;Kagoshima Y;Sachi N;Kamiyama N;Hasegawa H;Kobayashi T;Kodama M;Murakami K; {Journal}: Intern Med {Volume}: 0 {Issue}: 0 {Year}: 2024 Mar 11 {Factor}: 1.282 {DOI}: 10.2169/internalmedicine.3388-23 {Abstract}: A 35-year-old man with fever and diarrhea visited our hospital because of white string-like fecal excretion. Based on a morphological examination of the excreted object, a Diphyllobothrium infection was suspected. Additionally, Gram staining of a fecal sample revealed Campylobacter infection. After the intraduodenal administration of meglumine/diatrizoate sodium, the tapeworm was excreted. A polymerase chain reaction-based DNA sequence analysis demonstrated that the tapeworm excreted in this case was Diphyllobothrium nihonkaiensis. This report presents a rare case of coinfection with Diphyllobothrium nihonkaiensis and Campylobacter jejuni. Therefore, it is important to consider the coexistence of other intestinal infections when diagnosing parasitic infections in patients with fever.