Jaroslav Flegr

Publications

• Parasitism as the main factor shaping peptide vocabularies in current organisms
• PREVALENCE OF SEXUAL POSITIONS IN CZECH CITIZENS AND THE ASSOCIATION WITH FEMALE ORGASM POTENTIAL
• A comprehensive allometric analysis of 2nd digit length to 4th digit length in humans
• Cat scratches, not bites, are associated with unipolar depression - cross-sectional study
• Predictors of Toxoplasma gondii infection in Czech and Slovak populations: the possible role of cat-related injuries and risky sexual behavior in the parasite transmission
• Registered Replication Report: Rand, Greene, and Nowak (2012)
• Toxoplasma-infected subjects report an Obsessive-Compulsive Disorder diagnosis more often and score higher in Obsessive-Compulsive Inventory
• Banning paraphylies and executing Linnaean taxonomy is discordant and reduces the evolutionary and semantic information content of biological nomenclature
• Friends with malefit. The effects of keeping dogs and cats, sustaining animal-related injuries and Toxoplasma infection on health and quality of life
• Health status by gender, hair color, and eye color: Red-haired women are the most divergent
• General environmental heterogeneity as the explanation of sexuality? Comparative study shows that ancient asexual taxa are associated with both biotically and abiotically homogeneous environments
• Toxoplasmosis is a Risk Factor for Acquiring SARS-CoV-2 Infection and a Severe Course of Covid-19 Disease in The Czech and Slovak Population: A Preregistered Exploratory Internet Cross-Sectional Study
• RETRACTED ARTICLE: Differences in cognitive functions between cytomegalovirus-infected and cytomegalovirus-free university students: a case control study
• Differences in cognitive functions between cytomegalovirus-infected and cytomegalovirus-free university students: a case control study
• Depressiveness and Neuroticism in Bartonella Seropositive and Seronegative Subjects – Preregistered Case-Controls Study
• The effects of the phase of the menstrual cycle, hormonal contraception, pregnancy, and the marital and the parenthood status on partner preferences.
• The effects of the phase of the menstrual cycle, hormonal contraception, pregnancy, and the marital and the parenthood status on partner preferences.
• Association between latent toxoplasmosis and fertility parameters of men
• A virtue made of necessity: Is the increasing hierarchical complexity of sexual clades an inevitable outcome of their declining (macro)evolutionary potential?
• Friends with malefit. The effects of keeping dogs and cats, sustaining animal-related injuries and Toxoplasma infection on health and quality of life
• Toxoplasmosis is a risk factor for acquiring SARS-CoV-2 infection and a severe course of COVID-19 in the Czech and Slovak population: a preregistered exploratory internet cross-sectional study
• Toxoplasmosis: An important risk factor for acquiring SARS-CoV-2 infection and a severe course of Covid-19 disease
• Le Petit Machiavellian Prince: Effects of latent toxoplasmosis on political beliefs and values
• Lower performance of Toxoplasma-infected, Rh-negative subjects in the weight holding and hand-grip tests
• Effects of 105 biological, socioeconomic, behavioural, and environmental factors on the risk of SARS-CoV-2 infection and a severe course of Covid-19: A prospective longitudinal study
• Rhesus-minus phenotype as a predictor of sexual desire and behavior, wellbeing, mental health, and fecundity
• Toxoplasmosis: An important risk factor for acquiring SARS-CoV-2 infection and a severe course of Covid-19 disease, a cross-sectional study
• The importance of being heterozygote: effects of RHD-genotype-sex interaction on the physical and mental health of a non-clinical population
• A Virtue Made of Necessity: Is the Increasing Hierarchical Complexity of Sexual Clades an Inevitable Outcome of Their Declining (Macro)evolutionary Potential?
• Toxoplasmosis, but not borreliosis, is associated with psychiatric disorders and symptoms
• Increased 25(OH)D3 level in redheaded people: Could redheadedness be an adaptation to temperate climate?
• My Friend's True Self: Children's Concept of Personal Identity
• The role of balancing selection in maintaining human RhD blood group polymorphism: A preregistered cross‐sectional study
• Latent toxoplasmosis and olfactory functions of Rh positive and Rh negative subjects
• My Friend's True Self: Children's Concept of Personal Identity
• Sex differences in the influence of toxoplasmosis on stress and perceived anxiety: Evidence for the stress-coping hypothesis
• Habitat Selection Theory and the Preference for Flowers – Is There Empirical Support?
• Increased calcidiol level in redhaired people: Could redheadedness be an adaptation to temperate climate?
• New approach and new program for analyses of false negatives-contaminated data in medicine and biology
• How virtue signalling makes us better: moral preferences with respect to autonomous vehicle type choices
• Differences in cognitive performance between cytomegalovirus-infected and cytomegalovirus-free students
• Faster life history strategy manifests itself by lower age at menarche, higher sexual desire, and earlier reproduction in people with worse health
• Effect of being religious on wellbeing in a predominantly atheist country: Explorative study on wellbeing, fitness, physical and mental health
• Redheaded women are more sexually active than other women, but it is probably due to their suitors
• Presence of Toxoplasma gondii tissue cysts in human semen
• Retraction Note: Differences in cognitive functions between cytomegalovirus-infected and cytomegalovirus-free university students: a case control study
• Stability-based sorting: The forgotten process behind (not only) biological evolution
• How virtue signalling makes us better: Moral preferences with respect to autonomous vehicle type choices
• Skin fairness is a better predictor for impaired physical and mental health than hair redness
• New approach and new permutation tests with R programs for analyses of false negatives-contaminated data in medicine and biology
• Do differences in Toxoplasma prevalence influence global variation in secondary sex ratio? Preliminary ecological regression study
• What flowers do we like? The influence of shape and color on the rating of flower beauty
• The influence of latent toxoplasmosis on women's reproductive function: four cross-sectional studies
• Contrasting Effect of Prepulse Signals on Performance of Toxoplasma-Infected and Toxoplasma-Free Subjects in an Acoustic Reaction Times Test
• Does the prevalence of latent toxoplasmosis and frequency of Rhesus-negative subjects correlate with the nationwide rate of traffic accidents?
• Effects of Latent Toxoplasmosis on Autoimmune Thyroid Diseases in Pregnancy
• Justine Effect: Punishment of the Unduly Self-Sacrificing Cooperative Individuals
• Perceived Intelligence Is Associated with Measured Intelligence in Men but Not Women
• Toxoplasmosis - A Global Threat. Correlation of Latent Toxoplasmosis with Specific Disease Burden in a Set of 88 Countries
• Toxoplasmosis can be a sexually transmitted infection with serious clinical consequences. Not all routes of infection are created equal
• Why do some women prefer submissive men? Hierarchically disparate couples reach higher reproductive success in European urban humans
• DIFFERENT IMPACT OF T.GONDII SEROPOSITIVITY ON THE BRAIN MORPHOMETRY IN SCHIZOPHRENIA AND HEALTHY CONTROL GROUPS.
• Direct evidence of Toxoplasma-induced changes in serum testosterone in mice
• Evolutional background of dominance/submissivity in sex and bondage: the two strategies?
• Higher Extraversion and Lower Conscientiousness in Humans Infected with Toxoplasma
• Latent toxoplasmosis reduces gray matter density in schizophrenia but not in controls: Voxel-based-morphometry (VBM) study
• Rhesus Factor Modulation of Effects of Smoking and Age on Psychomotor Performance, Intelligence, Personality Profile, and Health in Czech Soldiers
• The relation of cortisol and sex hormone levels to results of psychological, performance, IQ and memory tests in military men and women
• Fatal Attraction Phenomenon in Humans - Cat Odour Attractiveness Increased for Toxoplasma-Infected Men While Decreased for Infected Women
• Positive effects of multiple gene control on the spread of altruism by group selection
• Potential immunomodulatory effects of latent toxoplasmosis in humans
• The Distribution of Toxoplasma gondii Cysts in the Brain of a Mouse with Latent Toxoplasmosis: Implications for the Behavioral Manipulation Hypothesis
• Eye color predicts but does not directly influence perceived dominance in men
• Pattern of money allocation in experimental games supports the stress hypothesis of gender differences in Toxoplasma gondii-induced behavioural changes
• Slower postnatal motor development in infants of mothers with latent toxoplasmosis during the first 18 months of life
• CLINICAL DIFFERENCES BETWEEN TOXOPLASMA GONDII SEROPOSITIVE AND SERONEGATIVE SCHIZOPHRENIA PATIENTS IN CZECH AND INTERNATIONAL STUDIES
• The relation of cortisol and sex hormone levels to results of psychological, performance, IQ and memory tests in military men and women (vol 33, pg 224, 2012)
• Toxoplasma gondii infection affects cognitive function (vol 59, pg 93, 2012)
• Elastic, not plastic species: Frozen plasticity theory and the origin of adaptive evolution in sexually reproducing organisms
• Increased pregnancy weight gain in women with latent toxoplasmosis and RhD-positivity protection against this effect
• Influence of latent toxoplasmosis on the phenotype of intermediate hosts INTRODUCTION
• Modulation of immunity in mice with latent toxoplasmosis-the experimental support for the immunosuppression hypothesis of Toxoplasma-induced changes in reproduction of mice and humans
• An elevated blood glucose level and increased incidence of gestational diabetes mellitus in pregnant women with latent toxoplasmosis
• Effect of Partnership Status on Preferences for Facial Self-Resemblance
• Heterozygote Advantage Probably Maintains Rhesus Factor Blood Group Polymorphism: Ecological Regression Study
• No Evidence of Association between Toxoplasma gondii Infection and Financial Risk Taking in Females
• Impaired health status and increased incidence of diseases in Toxoplasma-seropositive subjects - an explorative cross-sectional study
• Schizophrenia and Toxoplasma gondii: an undervalued association?
• Worse Health Status and Higher Incidence of Health Disorders in Rhesus Negative Subjects
• The Relation of Toxoplasma Infection and Sexual Attraction to Fear, Danger, Pain, and Submissiveness
• Difference of neuro- and immunomodulatory steroids and selected hormone and lipid concentrations between Toxoplasma-free and Toxoplasma-infected but not CMV-free and CMV-infected schizophrenia patients
• Masterpiece of epigenetic engineering - how Toxoplasma gondii reprogrammes host brains to change fear to sexual attraction
• Microevolutionary, macroevolutionary, ecological and taxonomical implications of punctuational theories of adaptive evolution
• Differences in onset of disease and severity of psychopathology between toxoplasmosis-related and toxoplasmosis-unrelated schizophrenia
• How and why Toxoplasma makes us crazy
• Influence of latent Toxoplasma infection on human personality, physiology and morphology: pros and cons of the Toxoplasma-human model in studying the manipulation hypothesis
• How Much Is Our Fairness Worth? The Effect of Raising Stakes on Offers by Proposers and Minimum Acceptable Offers in Dictator and Ultimatum Games
• Trustworthy-Looking Face Meets Brown Eyes
• Toxoplasmosis-Associated Difference in Intelligence and Personality in Men Depends on Their Rhesus Blood Group but Not ABO Blood Group
• Why Drosophila is not Drosophila any more, why it will be worse and what can be done about it?
• Increased incidence of traffic accidents in Toxoplasma-infected military drivers and protective effect RhD molecule revealed by a large-scale prospective cohort study
• Digit ratio (2D : 4D) and Cattell's personality traits
• He sees, she smells? Male and female reports of sensory reliance in mate choice and non-mate choice contexts
• Non-monophyly of Retortamonadida and high genetic diversity of the genus Chilomastix suggested by analysis of SSU rDNA
• Longer pregnancy and slower fetal development in women with latent "asymptomatic" toxoplasmosis
• Gender differences in behavioural changes induced by latent toxoplasmosis
• New evolutionary lineages, unexpected diversity, and host specificity in the parabasalid genus Tetratrichomonas
• Non-advertized does not mean concealed: Body odour changes across the human menstrual cycle
• Body height, body mass index, waist-hip ratio, fluctuating asymmetry and second to fourth digit ratio in subjects with latent toxoplasmosis
• Cryptic species within the Tetratrichomonas gallinarum species complex revealed by molecular polymorphism
• Tetratrichomonads from the oral cavity and respiratory tract of humans
• The phylogenetic position of enteromonads: a challenge for the present models of diplomonad evolution
• Critical analysis of the topology and rooting of the parabasalian 16S rRNA tree
• Female facial attractiveness increases during the fertile phase of the menstrual cycle
• Decreased level of psychobiological factor novelty seeking and lower intelligence in men latently infected with the protozoan parasite Toxoplasma gondii Dopamine, a missing link between schizophrenia and toxoplasmosis?
• Cattle pathogen Tritrichomonas foetus (Riedmuller, 1928) and pig commensal Tritrichomonas suis (Gruby & Delafond, 1843) belong to the same species
• The evolutionary history of testicular externalization and the origin of the scrotum
• The influence of RhD phenotype on toxoplasmosis- and age-associated changes in personality profile of blood donors
• Differences in the 2nd to 4th digit length ratio in humans reflect shifts along the common allometric line
• A Possible Role of Intracellular Isoelectric Focusing in the Evolution of Eukaryotic Cells and Multicellular Organisms
• Testosterone and cortisol levels in university students reflect actual rather than estimated number of wrong answers on written exam
• The role of dopamine in Toxoplasma-induced behavioural alterations in mice: an ethological and ethopharmacological study
• Women's preference for dominant male odour: effects of menstrual cycle and relationship status
• Phylogenetic position of Protoopalina intestinalis based on SSU rRNA gene sequence
• Decreased level of novelty seeking in blood donors infected with toxoplasma
• Inference of the phylogenetic position of oxymonads based on nine genes: Support for Metamonada and Excavata
• Influence of latent 'asymptomatic' toxoplasmosis on body weight of pregnant women
• Probable neuroimmunological link between Toxoplasma and cytomegalovirus infections and personality changes in the human host
• Brief Communication: Latent Toxoplasmosis and Salivary Testosterone Concentration-Important Confounding Factors in Second to Fourth Digit Ratio Studies
• Clonal turnover versus clonal decay: A null model for observed patterns of asexual longevity, diversity and distribution
• Molecular phylogeny of diplomonads and enteromonads based on SSU rRNA, alpha-tubulin and HSP90 genes: Implications for the evolutionary history of the double karyomastigont of diplomonads
• Neurophysiological effect of the Rh factor. Protective role of the RhD molecule against Toxoplasma-induced impairment of reaction times in women
• Sex-dependent toxoplasmosis-associated differences in testosterone concentration in humans
• SlowFaster, a user-friendly program for slow-fast analysis and its application on phylogeny of Blastocystis
• Toxoplasma and reaction time: role of toxoplasmosis in the origin, preservation and geographical distribution of Rh blood group polymorphism
• Effects of Toxoplasma on human behavior
• Higher perceived dominance in Toxoplasma infected men - a new evidence for role of increased level of testosterone in toxoplasmosis-associated changes in human behavior
• Influence of latent toxoplasmosis on the secondary sex ratio in mice
• Morphological and molecular diversity of the monocercomonadid genera Monocercomonasg Hexamastix, and Honigbergiella gen. nov.
• New and old risk-factors for Toxoplasma gondii infection: prospective cross-sectional study among military personnel in the Czech Republic
• Phylogenetic position of Karotomorpha and paraphyly of Proteromonadidae
• Women infected with parasite Toxoplasma have more sons
• Poorer results of mice with latent toxoplasmosis in learning tests: impaired learning processes or the novelty discrimination mechanism?
• Dominance, submissivity (and homosexuality) in general population. Testing of evolutionary hypothesis of sadomasochism by internet-trap-method
• Increased risk of traffic accidents in subjects with latent toxoplasmosis: a retrospective case-control study
• Comparison of European Trichobilharzia species based on ITS1 and ITS2 sequences
• Use of random amplified polymorphic DNA (RAPD) analysis for the identification of Giardia intestinalis subtypes and phylogenetic tree construction
• Construction and bootstrap analysis of DNA fingerprinting-based phylogenetic trees with the freeware program FreeTree: application to trichomonad parasites
• Concordance between genetic relatedness and phenotypic similarities of Trichomonas vaginalis strains
• Was Lysenko (partly) right? Michurinist biology in the view of modern plant physiology and genetics
• FreeTree-freeware program for construction of phylogenetic trees on the basis of distance data and bootstrap jackknife analysis of the tree robustness. Application in the RAPD analysis of genus Frenkelia.
• Correlation between aerobic and anaerobic resistance to metronidazole in trichomonads: application of a new computer program for permutation tests
• The role of psychological factors in questionnaire-based studies on routes of human toxoplasmosis transmission [In Process Citation]
• Characterization of trichomonad species and strains by PCR fingerprinting
• PTPT, the freeware program for permutation testing concordance between phylogeny and the distribution of phenetic traits
• MULTIPLE POPULATIONS OF DOUBLE-STRANDED-RNA IN 2 VIRUS-HARBORING STRAINS OF TRICHOMONAS-VAGINALIS
• A RAPID METHOD FOR ISOLATION OF DOUBLE-STRANDED-RNA
• Double stranded RNA in Trichomonas vaginalis
• Concordance between genetic relatedness and phenotypic similarities of Trichomonas vaginalis strains
• Decrease of psychomotor performance in subjects with latent 'asymptomatic' toxoplasmosis
• Correlation of duration of latent Toxoplasma gondii infection with personality changes in women
• Induction of changes in human behaviour by the parasitic protozoan Toxoplasma gondii
• Molecular phylogenetic relatedness of Frenkelia spp. (Protozoa, Apicomplexa) to Sarcocystis falcatula stiles 1893: Is the genus Sarcocystis paraphyletic?
• On the "origin" of natural selection by means of speciation
• Does a cell perform isoelectric focusing? (vol 24, pg 127, 1990)
• Environmental selection, the missing term in Darwinism
• Transient nature of Toxoplasma gondii-induced behavioral changes in mice
• Application of the RAPD technique for a study of the phylogenetic relationships among eight species of the genus Apodemus
• Changes in the personality profile of young women with latent toxoplasmosis
• Two distinct types of natural selection in turbidostat-like and chemostat-like ecosystems
• THE DSRNA OF TRICHOMONAS-VAGINALIS IS ASSOCIATED WITH VIRUS-LIKE PARTICLES AND DOES NOT CORRELATE WITH METORNIDAZOLE RESISTANCE
• INFLUENCE OF CHRONIC TOXOPLASMOSIS ON SOME HUMAN PERSONALITY-FACTORS
• Sequence of mitochondrial D-loop in laboratory and wild strains of mice of genus Mus
• DOES A CELL PERFORM ISOELECTRIC-FOCUSING
• A new and highly effective method for predicting T-cell response targets implemented on SARS-CoV-2 data
• Presence of Toxoplasma gondii tissue cysts in human semen: Toxoplasmosis as a potential sexually transmissible infection
• The effects of 105 biological, socioeconomic, behavioral, and environmental factors on the risk of SARS-CoV-2 infection and a severe course of COVID-19: A prospective, explorative cohort study
• Parasitic manipulation or side effects? The effects of past Toxoplasma and Borrelia infections on human personality and cognitive performance are not mediated by impaired health
• The Lasting Legacy of COVID-19: Exploring the Long-Term Effects of Infection, Disease Severity, and Vaccination on Health and Cognitive Function
• Superstitions, Religious Identity, and COVID-19 Conspiracy Beliefs in Secularized Czechia
• Exposing and Exploiting Host-Parasite Arms Race Clues in SARS-CoV-2: A Principally New Method for Improved T-cell Immunogenicity Prediction
• Is Recovery Just the Beginning? Persistent Symptoms and Health and Performance Deterioration in Post-COVID-19, non-hospitalised University Students - A Cross-Sectional Study
• Parasitic manipulation or side effects? The effects of past Toxoplasma gondii and Borrelia spp. infections on human personality and cognitive performance are not mediated by impaired health
• COVID's Long Shadow: How SARS-CoV-2 Infection, COVID-19 Severity, and Vaccination Status Affect Long-term Cognitive Performance and Health
• On the importance of being heterozygote -- Effects of Rh-genotype on the physical and mental health of a non-clinical population
• On the importance of being heterozygote Effects of Rh-genotype on the physical and mental health of a non-clinical population
• Does Viewing Cats and Dogs Influence People’s Mood, Optimism, and the Desire to Have Children?
• Macro and Micro Evolution
• Cognitive Effects of Toxoplasma and CMV Infections: A Cross-Sectional Study of 557 Young Adults Considering Modulation by Sex and Rh Factor
• Fertility of Czech Gay and Straight Men, Women, and Their Relatives: Testing the Sexually Antagonistic Gene Hypothesis
• Effects of Birth Order on Human Sexuality: the Sex of Siblings Matters
• Toxoplasma Infection and Its Sequential Impact on Physical Health, Stress, and Anxiety: A Large Cross-Sectional Study Testing the Stress-Coping Hypothesis
• Persistent Health and Cognitive Impairments Up to Four Years Post-COVID-19 in Young Students: The Impact of Virus Variants and Vaccination Timing
• Thirty years of studying latent toxoplasmosis: behavioural, physiological, and health insights
• Crusaders, monks and family fortunes: evolutionary models of male homosexuality and related phenomena