Toxoplasma gondii: Evidence for the transmission by semen in dogs

Arantes, Tiago Pereira; Lopes, Welber Daniel Zanetti; Ferreira, Roberta Machado; Pieroni, J. S. P.; Pinto, Vanessa Marigo Rocha; Sakamoto, Cláudio Alessandro Massamitsu; Costa, Alvimar José da

doi:10.1016/j.exppara.2009.07.003

Cited by 89 publications

(69 citation statements)

References 24 publications

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“…Vertical transmission has been demonstrated in many mammalian hosts, including humans, dogs [40], rodents [20], sheep [41], and marsupials [42] and is likely to be a common route of transmission in nature [41]. The idea that vertical transmission may be important in the life cycle of T. gondii is not new.…”

Section: Box 2 the Importance Of Vertical Transmissionmentioning

confidence: 99%

Adaptive host manipulation by Toxoplasma gondii: fact or fiction?

Worth

Lymbery

Thompson

2013

Trends in Parasitology

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Section: Box 2 the Importance Of Vertical Transmissionmentioning

confidence: 99%

Adaptive host manipulation by Toxoplasma gondii: fact or fiction?

Worth

Lymbery

Thompson

2013

Trends in Parasitology

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“…In our population, the female responders most often reported having sex with a dog. A dog is one of few animal species for which the experimental transmission by ejaculate has been demonstrated (Arantes et al, 2009). …”

Section: 36mentioning

confidence: 99%

The Relation of Toxoplasma Infection and Sexual Attraction to Fear, Danger, Pain, and Submissiveness

Flegr

Kuba

2016

Evol Psychol

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Behavioral patterns, including sexual behavioral patterns, are usually understood as biological adaptations increasing the fitness of their carriers. Many parasites, so-called manipulators, are known to induce changes in the behavior of their hosts to increase their own fitness. Such changes are also induced by a parasite of cats, Toxoplasma gondii. The most remarkable change is the fatal attraction phenomenon, the switch of infected mice's and rat's native fear of the smell of cats toward an attraction to this smell. The stimuli that activate fear-related circuits in healthy rodents start to also activate sex-related circuits in the infected animals. An analogy of the fatal attraction phenomenon has also been observed in infected humans. Therefore, we tried to test a hypothesis that sexual arousal by fear-, violence-, and danger-related stimuli occurs more frequently in Toxoplasma-infected subjects. A cross-sectional cohort study performed on 36,564 subjects (5,087 Toxoplasma free and 741 Toxoplasma infected) showed that infected and noninfected subjects differ in their sexual behavior, fantasies, and preferences when age, health, and the size of the place where they spent childhood were controlled (F(24, 3719) ¼ 2.800, p < .0001). In agreement with our a priori hypothesis, infected subjects are more often aroused by their own fear, danger, and sexual submission although they practice more conventional sexual activities than Toxoplasma-free subjects. We suggest that the later changes can be related to a decrease in the personality trait of novelty seeking in infected subjects, which is potentially a side effect of increased concentration of dopamine in their brain.

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“…Artificial insemination of female dogs with T. gondii positive seminal samples induced the serologic conversion. These results suggest that T. gondii can be sexually transmitted in domestic dogs [18].…”

Section: Discussionmentioning

confidence: 81%

Assessment of Testosterone Hormone Level in Patients with Toxoplasmosis Attending Omdurman Military Hospital

2015

IJSR

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Abstract:Objective: to evaluate and compare serum testosterone in patients with toxoplasmosis and normal healthy individuals. Materials and Methods: A case control study was conducted in 150 subjects in military hospital, during the period from February to June 2015. The studied population consisted: 100 patients already diagnosed as toxoplasmosis patients (58 male and 42 female) as cases and 50 apparently healthy individuals (32 male and 18 female) as controls. Five ml of The blood samples were collected and sera separated by centrifugation at 4000 rpm. the serum testosterone levels were accurately measured and compared. Results: We found significantly increasing in serum testosterone levels in toxoplasmosis patients as compared to control (p=0.000). also we found significantly increasing in serum testosterone levels inmale patients as compared to control male(p=0.000), also a significantly increasing in serum testosterone levels in female as compared to control female(p=0.000).also we found significantly increasing in serum testosterone levels in patient male as compared to patient female(p=0.001). Conclusion: These findings concluded that toxoplasmosis is associated with higher serum testosterone levels.

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Toxoplasma gondii: Evidence for the transmission by semen in dogs

Cited by 89 publications

References 24 publications

Adaptive host manipulation by Toxoplasma gondii: fact or fiction?

Adaptive host manipulation by Toxoplasma gondii: fact or fiction?

The Relation of Toxoplasma Infection and Sexual Attraction to Fear, Danger, Pain, and Submissiveness

Assessment of Testosterone Hormone Level in Patients with Toxoplasmosis Attending Omdurman Military Hospital

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