T. gondii Infection in Urban and Rural Areas in the Amazon: Where Is the Risk for Toxoplasmosis?

Seroprevalence of Toxoplasma gondii, risk factors and knowledge about toxoplasmosis in undergraduate students from Lima, Peru

Toxoplasma gondii is the causative agent of toxoplasmosis, a zoonotic disease of worldwide distribution. The aim of this study was to assess the seroprevalence of T. gondii in undergraduate students from Lima, Peru, and to identify the risk factors linked to the infection. For this, serum samples of 100 undergraduate students of the Faculty of Biological Sciences were tested for T. gondii antibodies with a commercially available ELISA. The seroprevalence of T. gondii in these subjects was 7 %. Only the age of students showed a statistical association with T. gondii seropositivity. The level of awareness regarding toxoplasmosis was also investigated. In the sample, 71 % of the students are aware of toxoplasmosis and 64 % that a parasite is the cause of the infection. Most know it is transmitted through undercooked meat (57 %), but are unaware of contaminated vegetables (40 %), organ transplants (17 %), blood transfusions (32 %), and soil contact (39 %). In the epidemiological context it will be valuable to verify toxoplasmosis awareness in other population groups and other regions in Peru.

Toxoplasma gondii in a Remote Subsistence Hunting-Based Indigenous Community of the Peruvian Amazon

Toxoplasma gondii is a ubiquitous zoonotic protozoan parasite that infects a wide variety range of warm-blooded animals. This study describes the epidemiological scenario of T. gondii in an indigenous community that relies on subsistence hunting in a well-conserved and isolated area of the Peruvian Amazon. The high seropositivity against T. gondii in humans (83.3% IgG and 6.1% IgM), wild mammals (30.45%, 17 species), peri-domestic rodents (10.0% Rattus sp.), and domestic animals (94.1% dogs and 100% cats) indicates the existence of a sylvatic cycle in the community under study. Individual age was found to be positively associated with IgG detection against T. gondii but not with IgM. It is estimated that each family consumed 5.67 infected animals per year with terrestrial species having higher infective rates than arboreal species. The main risk factors included improper handling and cooking of wild meat, poor hygiene practices, and feeding uncooked offal to domestic animals. This scenario results in a continuous process of infection and reinfection within the indigenous community with cats, dogs, and peri-domestic animals becoming infected through the ingestion of infected raw viscera. Our results emphasize the need to promote safe food handling practices and disposal of waste materials from hunted animals in such communities.

Seroprevalence of toxoplasmosis at referral hospitals in the northwestern region, Saudi Arabia

BACKGROUND

Toxoplasmosis is induced by Toxoplasma gondii, which affects 30 percent of the global population and is responsible for deaths related to foodborne pathogens. This study aimed to describe the seroprevalence of T. gondii infections in patients attending referral hospitals in the northwestern region of Saudi Arabia.

MATERIALS AND METHODS

The serology test results for T. gondii antibodies of 797 patients were retrospectively analyzed using the hospitals' database. The enzyme-linked immunosorbent assay was used to detect anti-T. gondii antibodies (IgG and/or IgM).

RESULTS

Overall, the prevalence of anti-T. gondii antibodies was 8.3%. Higher (9.9%) prevalence of positive results among patients aged 30 years and above was observed. Statistically, the various age groups (P = 0.031) were found to be significant. Female was noted to have increased (8.1%) seroprevalence, and the incidence of infection occurred largely among participants living in rural areas (8.2%).

CONCLUSIONS

Toxoplasmosis remains a public health concern. The seroprevalence of T. gondii antibodies was relatively low in the study area. IgG antibodies to T. gondii were mainly detected. Increasing awareness on the mode of transmission, source of infection, and disease prevention through health education and dissemination is vital to reduce or eliminate toxoplasmosis.

Seroprevalence of Toxoplasma gondii in Females Aged 15-45 Years from Bihor County, Western Romania

Toxoplasma gondii is a protozoan parasite that causes an important worldwide zoonosis called toxoplasmosis. This infection is often asymptomatic in immunocompetent people. If the infection occurs in pregnant women, it poses great risks to the infant due to its clinical manifestations as mental retardation, seizures, or chorioretinitis. In this study, we evaluated the seroprevalence of IgG antibodies against T. gondii in females aged 15-45 years in Bihor County, Romania. Serum samples drawn from 1935 females aged 15-45 years were screened for IgG antibodies against T. gondii. T. gondii antibodies were found in 706 females (36.48%) and the proportion of IgG positive females tended to increase with age. The seroprevalence was higher in females residing in rural areas (47.79%) compared with those from urban areas (30.95%). This is the first study on the seroprevalence of toxoplasmosis in females aged 15-45 years from Bihor County, Romania. Our survey brings new and important data regarding the seroepidemiology of T. gondii and provides an insight into the demographic risk factors as a basis for a future prevention program for toxoplasmosis.