(1) Objective To explore the research progress of coccoid H. pylori.

(2) They are spherical ( coccoid ) or form long microscopic filaments of individual cells.

(3) OBJECTIVE To explore whether the coccoid formed by Bifidobacterium under the unfavorable conditions belongs to the bacterial cryptic growth cells.

(4) Aim To testify the pathogenicity of coccoid Helicobacter pylori in vivo.

(5) S. guan carried coccoid Beauveria bassiana to control M. alternatus in the wood section, and the rate was 87.13%.

(6) Objective:To understand the effect of coccoid Helicobacter pylori on proliferation of gastric carcinoma epithelial line SGC-7901 cultured in vitro.

(7) Aim To reveal the virulence variation related to vacuolating cytotoxicity of coccoid Helicobacter pylori .

(8) Methods and Results To review the literatures, and summarize the contents from the overview, pathogenicity, virulent genes and possible mechanisms of coccoid conversion in H. pylori .

(9) Aim To reval the virulence variation related to vacuolating cytotoxicity of coccoid Helicobacter pylori.