The present study found a slightly higher prevalence rate of 13.3% among Type 2 Diabetes Mellitus (T2DM) subjects when compared to the global prevalence rate of around (3%) in the general population. The results obtained in this study compares with the work of Nwokediuko et al.,, (2008) in Enugu where HCV occurrence rate among diabetic patients was found to be 14.0% (16). Although, Ejele et al., (2005) and Balogun et al.,, (2006), obtained a prevalence of 3.0% in Niger Delta region and 0.0% in Ibadan which is in contrast with the other results obtained by (17,18). Similar study conducted among diabetics by Ndako et al.,, (2009) showed 11.0% prevalence in Jos which is also lower than the result obtained in this study, while a prevalence of 5.0% was recorded in a study carried out among diabetes patients at UITH, Ndako et al., (2011), while 5.7% prevalence was reported from India Demitrost et al., 2015, which is lower compared to the findings obtained in this study.. However, Gray et al was the first to show a higher prevalence of HCV infection in T2DM patients with a prevalence of 8% among Asian patients. Differences in the incidence rate of HCV results attained from various regions globally depict geographical diversity. The variation in these occurrence rates can be ascribed to exposure to various risk factors which are capable of enhancing the spread and transmission of this virus amongst individuals(19).
The Prevalence rate of HCV infection among males recorded 8(4.4%) while the female subjects had 14(8.9%) seropositivity. This finding agrees with the result obtained from a similar work by Ndako et al.,, (2009) and Gacche et al.,, (2012) where the incidence of anti-HCV in diabetic among the female subjects were higher compared to the male subjects.Increased rate of occurrence in females could be attributed to various risk factor HCV infection, which was quite evident from the life style and history of the individuals recruited for this study(20).
A higher prevalence rate of 9(5.0%) was observed amongst subjects aged 41–50, this result is in accordance with the findings of Mehta et al.,, (2003) in which subjects above 40 years of age were found to be more likely to have diabetes with HCV infection compared to persons below 40 years of age (21), which is also closer to the results obtained by Klevens et al.,, (2009) which showed a higher incidence rate among subjects aged 35–44 and this concurs with the result gotten in this study(22). The high seropositivity observed in older age group could be attributed to possible differences in social practices, parenteral exposures, decline in physical mobility and a reduced rate of medical examination compared to younger individuals thus increasing chances of transmission of infection.(23).
The result obtained in this study showed that having multiple sexual partners is a major means of spreading HCV; however, it was observed that the prevalence of HCV was higher among married subjects (15.4%), similar study carried out by Qureshi et al.,, (2010) recorded a higher prevalence among married subjects. This is findings could be as a result of increased exposure to several risk factors to this infectious agent(24).
Regardless of the fact that HCV is a blood-borne virus, the sero-prevalence among individuals that had undergone blood transfusion or donation is of no statistical significant difference and this agrees with the work of Simo et al., (1996)(25).Among subjects that had history of blood donation in this study, 3 (1.7%) were found to be positive to HCV. However, it is observed that blood and blood products are potential sources of transmission for HCV infection(20). In the present study, sharing personal items that may be contaminated with infected blood and tattooing were defined as HCV predictors. The risk of HCV continues to be a great occupational threat. Consequently, blood transfusion was also identified as a predictor of HCV Infection(26).
High rate of positivity was observed in subjects screened for alcohol consumption, sharing of unsterilized objects and subjects that had tribal marks or tattoo ranging from 3.9%, 2.2% and 2.8% respectively with no statistical significant difference. However, participants with family history of diabetes recorded a sero-prevalence of 6.7% to HCV infection, This report is similar to the work of Muller et al.,, (1994) where the increased incidence of HCV was closely related with family history of diabetes mellitus, A significant difference was observed in participants with a family history of diabetes mellitus and those without, (27,28); this might be attributed to multiple sexual partners, transfusion of unscreened blood in hospitals, family history of related infections, risky behaviours such as alcohol intake and other potential unidentified routes of transmission which can only be discovered through advance studies(29).
This study found that elevated liver enzymes; especially ALT has a direct relationship with seropositivity to HCV in the diabetic population studied, showing the relevance of this as a screening test in diabetics. In a study by Mason, 2000 more than 20% of diabetes patients with consistently elevated serum aminotransferases had evidence of HCV infection. It was also discovered that most of the anti-HCV positive diabetic patients presented with an abnormal liver function tests, a combination of hepatocellular and cholestasis pattern being the predominant biochemical alteration(25). Elevation of ALT in hepatitis C positive diabetes patients in this study is usually mild, with most having ALT level between one to two times upper limit of normal.