## 2 Results and Discussion
### Identification of VOCsB
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Specie Bacteria** & **Pk No.** & **Extraction Technique** & **VOCoSB** & **KRI** & **Ref. KRI** & **Characteristic EI Ions** \\ \hline  & 1 & SHS-SPME & (methyl disulfanyl) methane & 691 & 735 [46] & 45, 61, 69, 79,83, 91, 94 (M+) \\  & 2 & SHS-SPME & (methyl trisulfanyl) methane & 966 & 961 [46] & 64, 79, 83, 111, 113, 126 (M+) \\  & 3 & SHS-SPME & phenol & 977 & 980 [47] & 40, 55, 66, 94 (M+) \\ _Klebsiella_ sp. & 4 & SHS-SPME & 2-phenylethanol & 1087 & 1078 [48] & 51, 67, 79, 92, 22 (M+) \\  & 5 & SHS-SPME & decan-1-ol & 1234 & 1256 [49] & 43, 70, 83, 97, 112, 140, 158 (M+) \\  & 6 & SHS-SPME & indole & 1251 & 1288 [50] & 40, 58, 63, 74, 90, 120, 117 (M+) \\  & 7 & SHS-SPME & tridecan-2-one & 1475 & 1474 [51] & 43, 58, 71, 89, 96, 140, 190 (M+) \\  & 1 & SHS-SPME & (methyl disulfanyl) methane & 691 & 735 [46] & 45, 61, 69, 79,83, 91, 94 (M+) \\  & 2 & SHS-SPME/DIS-SPE & (methyl trisulfanyl) methane & 966 & 961 [46] & 64, 79, 83, 111, 113, 126 (M+) \\  & 3 & SHS-SPME/DIS-SPE & phenol & 977 & 980 [47] & 40, 55, 66, 74, 94 (M+) \\ _Morgantella morganii_ & 4 & SHS-SPME/DIS-SPE & 2-phenylethanol & 1087 & 1078 [48] & 51, 67, 79, 91, 22 (M+) \\  & 5 & SHS-SPME & decan-1-ol & 1234 & 1256 [49] & 43, 70, 83, 97, 112, 140, 158 (M+) \\  & 6 & SHS-SPME & indole & 1251 & 1288 [50] & 40, 58, 63, 74, 90, 120, 117 (M+) \\  & 7 & SHS-SPME & undecan-1-ol & 1282 & 1372 [51] & 56, 69, 83, 97, 111, 154, 172 (M+) \\  & 1 & SHS-SPME & 3-methylbutan-1-ol & 688 & 734 [50] & 42, 55, 57, 70, 87, 88 (M+) \\  & 2 & SHS-SPME/DIS-SPE & 2-phenylethanol & 1087 & 1078 [48] & 51, 65, 67, 91, 22, 22 (M+) \\  & 3 & SHS-SPME & ethyl octanoate & 1179 & 1192 [52] & 57, 88, 127, 127 (M+) \\ _Klebsiella oxytocin_ & 4 & SHS-SPME & decan-1-ol & 1234 & 1256 [49] & 43, 70, 83, 97, 112, 140, 158 (M+) \\  & 5 & SHS-SPME & indole & 1251 & 1288 [50] & 40, 58, 63, 74, 90, 120, 117 (M+) \\  & 6 & SHS-SPME & dodecan-1-ol & 1461 & 1473 [53] & 69, 83, 711, 140, 146, 186 (M+) \\  & 7 & SHS-SPME & tridecan-2-one & 1475 & 1474 [51] & 58, 71, 140, 169, 183, 198 (M+) \\  & 1 & SHS-SPME & (methyldisulfanyl) methane & 691 & 735 [46] & 45, 61, 69, 79,83, 91, 94 (M+) \\  & 2 & SHS-SPME/DIS-SPE & (methyltrisulfanyl) methane & 966 & 961 [46] & 46, 79, 83, 111, 113, 126 (M+) \\  & 3 & SHS-SPME/DIS-SPE & phenol & 977 & 980 [47] & 40, 55, 66, 74, 94 (M+) \\  & 4 & SHS-SPME/DIS-SPE & 2-phenylethanol & 1087 & 1078 [48] & 51, 65, 77, 91, 22 (M+) \\  & 5 & SHS-SPME & ethyl octanoate & 1179 & 1192 [52] & 57, 88, 127, 143, 157, 127 (M+) \\  & 6 & SHS-SPME/DIS-SPE & (methyltrisulfanyl) methane & 1204 & 1210 [54] & 45, 64, 79, 94, 111, 145, 158 (M+) \\  & 7 & SHS-SPME & decan-1-ol & 1234 & 1256 [49] & 43, 70, 83, 97, 112, 140, 158 (M+) \\  & 8 & SHS-SPME & undecan-1-ol & 1282 & 1372 [51] & 55, 69, 83, 97, 111, 154, 172 (M+) \\ \hline \hline \end{tabular}  
* Pk No (peak number), headspace-solid phase microextraction (SHS-SPME), dynamic headspace Super Q solid-phase extraction (DHS-SPE), volatile organic compounds from bacteria (VOCoSB), and Kovats Retention Index (KRI), Electron Ionization (EI).  
\end{table} 
Table 3: VOCoSB from the _Klebsiella_ sp. captured by SHS-SPME and DHS-SPE. Figure 1: Representative total ion chromatogram and chemical structure of the volatile organic compounds from bacteria (VOCsB) from bacteria isolated in the genital chamber of _Cycloccephala lunulata_ (**a**,**b**) and _Cycloccephala lurrerai_ (**c**,**d**). Red color: peak number and blue: retention time (minutes). (Methyl disulfanyl) methane (mdm), (methyl trisulfanyl) methane (mtm), phenol (p), 2-phenylethylanol (pe), decan-1-ol (do), indole (i), tridecan-2-one (to), undecan-1-ol (vdo), 3-methylbutan-1-ol (mo), dodecan-1-ol (dod), and (methyltetrasulfanyl) methane (mts). The genome of _K. oxytoca_ suggests that this microorganism may emit short-chain alcohols [45].