# Prevalence of _Trichomonas tenax_ in the Population Affected by Periodantal Disease--A Review
## 3 Results
### Demonstration of Our Results
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Continent** & **Total Number of Collected Samples** & **Total Number of Samples Infected with Trichomonas tenax** & **\% of Samples Infected with Trichomonas tenax** \\ \hline Europe & 4531 & 790 & 17\% \\ \hline Asia & 4931 & 713 & 14\% \\ \hline South America & 345 & 114 & 33\% \\ \hline North America & 1722 & 503 & 28\% \\ \hline Africa & 740 & 95 & 12\% \\ \hline \hline \end{tabular}
\end{table} 
Table 3: _Trichomonas tenax_ prevalence studies carried out in Europe. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Author(s)** & **Year** & **Country** & \begin{tabular}{c} **Number of Tested** \\ **Samples** \\ \end{tabular} & \begin{tabular}{c} **Number of Samples** \\ **Positive for _Trichomonas_** \\ _tenax_ \\ \end{tabular} & \begin{tabular}{c} **Used Method for** \\ **Detection** \\ \end{tabular} \\ \hline [PERSON] et al. [44] & 1985 & Japan & 307 & 96 & Cultivation \\ \hline [PERSON], 1988 [45] & 1988 & China & 572 & 79 & Light microscopy \\ \hline [PERSON] et al. [46] & 1993 & Iraq & 143 & 12 & Light microscopy \\ \hline [PERSON] et al. [47] & 2003 & China & 427 & 13 & Unknown \\ \hline [PERSON] et al. [48] & 2007 & Iran & 160 & 33 & PCR \\ \hline [PERSON] et al. [49] & 2007 & Iraq & 156 & 18 & Light microscopy \\ \hline [PERSON] et al. [50] & 2009 & China & 492 & 46 & Light microscopy \\ \hline [PERSON] et al. [51] & 2010 & Iran & 50 & 3 & Light microscopy \\ \hline [PERSON] and [PERSON] [52] & 2012 & Iraq & 60 & 28 & Light microscopy \\ \hline [PERSON] et al. [53] & 2012 & Iraq & 500 & 56 & Light microscopy \\ \hline [PERSON] [54] & 2015 & Iran & 52 & 14 & PCR \\ \hline [PERSON] et al. [55] & 2015 & Iraq & 100 & 27 & \
\begin{tabular}{c} Light microscopy, \\ cultivation \\ \end{tabular} \\ \hline [PERSON] [56] & 2016 & Iraq & 58 & 33 & PCR \\ \hline [PERSON] et al. [57] & 2017 & Iran & 270 & 1 & Light microscopy \\ \hline [PERSON] and & 2017 & Saudi Arabia & 56 & 7 & Light microscopy \\ \hline [PERSON] [58] & 2018 & Iran & 76 & 11 &
\begin{tabular}{c} Light microscopy, \\ PCR \\ \end{tabular} \\ \hline [PERSON] et al. [60]. & 2018 & Iran & 140 & 17 & Light microscopy \\ \hline [PERSON] et al. [61] & 2018 & Iraq & 160 & 40 & PCR \\ \hline [PERSON] et al. [62] & 2019 & Iraq & 184 & 8 & PCR \\ \hline [PERSON] et al. [63] & 2020 & Iraq & 310 & 64 & PCR \\ \hline [PERSON] et al. [64] & 2021 & Iran & 143 & 82 & PCR \\ \hline [PERSON] et al. [65] & 2020 & Iraq & 315 & 7 & PCR \\ \hline [PERSON] and [PERSON] & 2023 & Iraq & 200 & 18 & Light microscopy \\ \hline \hline \end{tabular}
\end{table} 
Table 4: _Trichomonas tenax_ prevalence studies carried out in Asia. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Author(s)** & **Year** & **Country** & \begin{tabular}{c} **Number of Tested** \\ **Samples** \\ \end{tabular} & \begin{tabular}{c} **Number of Samples** \\ **Positive for _Trichomonas_** \\ _tenax_ \\ \end{tabular} & \
\begin{tabular}{c} **Used Method for** \\ **Detection** \\ \end{tabular} \\ \hline [PERSON] et al. [67] & 1999 & Argentina & 25 & 10 & Light microscopy \\ \hline [PERSON] et al. [68] & 2001 & Argentina & 50 & 10 &
\begin{tabular}{c} Light microscopy, \\ cultivation \\ \end{tabular} \\ \hline [PERSON] et al. [69] & 2003 & Argentina & 50 & 16 & Light microscopy \\ \hline [PERSON] et al. [70] & 2009 & Venezuela & 25 & 1 & Light microscopy \\ \hline [PERSON] et al. [71] & 2011 & Brazil & 42 & 12 & Light microscopy \\ \hline [PERSON] et al. [72] & 2012 & Brazil & 53 & 9 & Cultivation \\ \hline [PERSON] [73] & 2014 & Brazil & 50 & 28 & Cultivation \\ \hline [PERSON] et al. [74] & 2019 & Chile & 50 & 28 & PCR \\ \hline \hline \end{tabular}
\end{table} 
Table 5: _Trichomonas tenax_ prevalence studies carried out in South America. A relatively large number of studies have been conducted in Europe, with the majority carried out in Poland. In nine of these cases, light microscopy was used as a confirmatory method. Biochemical methods were also present in one of them, and PCR was present in two of them.