Mexican State Research Articles

“We are with Mexico”, the change in discourse of the Presbyterian, Baptist and Methodist Churches in the face of the religious reforms of 1988-1992

In December 1988, during his inauguration speech, Carlos Salinas de Gortari proposed the modernization of relations between the Mexican State and the Church. From that moment on, and during the following four years, academics, legislators, and leaders of different Protestant Churches participated in discussions about the relevance and perils of making legal changes in religious matters. This debate led to the transformation of the relationship between the Mexican State and the creation of the legal figure of Religious Associations. Based on research in newspaper sources such as documents and official announcements of the Churches, the change in the discourse during the four years that the debate on the reforms in religious matters lasted is analyzed. Keys words: Protestantism, Protestant Churches, constitutional amendments, Religious Associations.

Determination of the Concentration of Heavy Metals in Artisanal Cheeses Produced in the Mexican States of Tabasco and Chiapas.

Cheese consumption provides humans with minerals, proteins, carbohydrates, and vitamins. In Mexico, several cheese varieties are produced, each with its texture, scent, and flavor. The artisanal cheeses made in the states of Tabasco and Chiapas-including, among others, the varieties named crema (cream), doble crema (double cream), oaxaca, panela, fresco, bola, poro, cotija, and asadero-have a high demand in the domestic and foreign markets. The intensification of anthropic activity in these states causes an increased emission to the environment of contaminants like heavy metals, which could reach human foodstuffs through the food chains. In particular, heavy metal contents in cheeses consumed daily by these states' local populations might represent a public health risk. Because of that, our objectives in this work were to determine the concentrations of lead, cadmium, nickel, copper, zinc, and iron in artisanal cheeses produced in the states of Tabasco and Chiapas and to determine the values of the hazard quotient (HQ), total hazard quotient (THQ), and cancer risk total (CRT) for adult and young men and women. The results of our analyses of cheese samples from the states of Tabasco and Chiapas showed that the average concentrations (mg kg-1) of cadmium (0.0023 ± 0.002, 0.0023 ± 0.002 mg kg-1, respectively, for each state), lead (0.0047 ± 0.00, 0.0051 ± 0.002), nickel (0.0039 ± 0.0046, 0.0031 ± 0.0039), copper (0.0199 ± 0.021, 0.0202 ± 0.022), zinc (0.1611 ± 0.18, 0.194 ± 0.21), and iron (61.84 ± 4.23, 65.76 ± 6.61 mg kg-1), the first three values lower than the limits established by the FAO/WHO and Codex Alimentarius. The value of THQ that we obtained was less than one, and that of CRT was within the limits established by the US-EPA, which means that the consumption of artisanal cheeses from Tabasco and Chiapas by humans does not imply a risk of disease or cancer.

Mexican Antigones: In Search of a Stolen Mourning

Analyzing the Mexican case of collectives of women currently looking for their disappeared relatives due to an escalation of violence related to the socalled War against Drugs that former president Felipe Calderón (2006–2012) started, this essay develops a new conception of politics grounded not only on rational thought but also on affect. These collectives put forward a materialistic, feminist, and performative mode of politics. Publicly lamenting their losses and literally digging bodies out of Mexican land, these women perform and recover the citizenship that the Mexican state has de facto disavowed of them. The author proposes conceptualizing them as “bad victims” since their taking action does not take away their pain; rather, the public exposure of their lament actually turns them into political agents.

The COVID-19 pandemic and non-COVID-19 healthcare utilization in Mexico

ObjectivesThis study aimed to analyze the effects of the COVID-19 pandemic on non-COVID-19 healthcare utilization in Mexico, including oral health, mental health, communicable disease visits, health checkups, chronic degenerative disease visits, postpartum care, prenatal care, and family planning visits. Study designThis was a retrospective ecological analysis during the COVID-19 pandemic. During the pandemic, the Mexican government recommended non-essential consultations be suspended or rescheduled to accommodate the new demand for healthcare services from COVID-19 patients. MethodsThis study uses administrative data from Mexico's Ministry of Health from January 2017 to December 2022. These data cover 14,299 consultation units and 775 hospitals from the 32 Mexican States, all of which are public institutions. A difference-in-differences strategy and an event study specification are used to study the impacts of the pandemic on non-COVID-19 healthcare utilization. ResultsThe findings reveal a decrease in the utilization of all healthcare services: oral health (69%), mental health (27%), communicable diseases (46%), chronic degenerative diseases (36%), health checkups (62%), family planning (45%), prenatal care (36%), and postpartum care (44%). Furthermore, the event study indicates that most services follow a U-shaped trend, although only mental health services clearly return to prepandemic levels. The remainder of services remain below prepandemic levels at the end of 2022. ConclusionsThe 2020 pandemic had detrimental effects on non-COVID-19 healthcare utilization. The healthcare interruptions will likely impact short- and long-term morbidity and mortality. Programs intended to remediate these negative consequences may be of interest to public health policymakers.

Sandino in Mexico: The Perils of Anti-Imperialist Alliances

Abstract: Scholars seem to share a blind faith than anti-imperialist alliances between states and/or non-state actors are, ipso facto, worthwhile and successful. Yet guerrilla leader Augusto Sandino’s collaboration with allies from beyond his native Nicaragua brought him into a web of dependence that nearly destroyed his movement. For a few years, his support from Honduras, Mexico, and points farther away seemed to herald a far-reaching and powerful resistance movement to U.S. military interventions in Latin America. Yet the very fraying of some of those alliances compelled Sandino to leave his own rebellion and relocate to Mexico for almost an entire year in 1929–1930. There, he lost more allies than he made, as he found himself caught up in strategic and political disputes between Mexican and Soviet communists and between those same Mexican communists and the ideologically hardening Mexican state. While many ordinary Mexicans fêted Sandino, erstwhile partners isolated and nearly starved him of resources. Historians of Sandino’s Mexican trip have noted its failure, but they have remained largely unconcerned with the meanings of the trip for the larger transformations occurring on the continent or the lessons it offered for transnational, multi-party alliances. Documents from Nicaragua, the United States, and Europe demonstrate that divided ideologies and structural weaknesses hobbled the many relationships at play from the start.

Nuevos registros estatales de la cucaracha mimética de luciérnaga Achroblatta luteola (Blanchard, 1843) (Blattodea: Blaberidae: Panchlorinae) en México

The firefly-mimicking cockroach Achroblatta luteola (Blanchard, 1843) (Blattodea: Blaberidae: Panchlorinae) is newly recorded for the Mexican states of Chiapas, Guanajuato, Puebla, Quintana Roo and Tabasco via the examination of specimens deposited in scientific collections and observations in a citizen science platform.

Envisioning the Revolution: Art and the Creation of Mexico’s Communist Party

Abstract This article analyzes the interactions of artists, Mexico’s Communist Party, or the Partido Comunista Mexicano (pcm), and the Mexican state within the context of Mexico’s vibrant post-revolutionary era. Although during these early years the Party’s official membership numbers remained relatively minimal, this article argues that the extraordinary influence of Mexico’s creative participants on the politics of the period was significant. During the 1920s the pcm derived a great deal of prestige from its association with art and the muralists, including Diego Rivera and David Alfaro Siqueiros, and as a result Mexico’s lively political and artistic scene attracted the attention of writers, photographers, artists, and intellectuals from all over the world. Art and politics intertwined as artists played major roles in political affairs, and politicians appropriated the arts to transmit the “official” national history. Indeed, during these exhilarating years, the artists and the pcm built a powerful coalition, and one whose influence endured long beyond the 1920s.

Floral visitors of three species of <i>Corallorhiza</i> in Monte Tláloc, Texcoco, Estado De México, Mexico

Corallorhiza is a genus of mycoheterotrophic orchids that includes 12 species, most of them restricted to North and Central America. In Mexico, there are seven taxa, distributed throughout the country, except for seven of the 32 Mexican states; in Estado de México all of them are present. The Orchidaceae is known for its diversity of pollination syndromes; however, for the more than 200 species of mycoheterotrophic orchids, little has been studied about their floral visitors and pollinators, and for the Mexican species of Corallorhiza nothing is known to date. Our goal was to document photographically and identify all the floral visitors of three sympatric species of the genus in Monte Tláloc, municipality of Texcoco, Estado de México. We observed individuals of Araneae, Coleoptera, Diptera, Hemiptera, and Hymenoptera visiting flowers of Corallorhiza macrantha, C. macrantha × C. maculata, C. maculata, and C. striata. Only Ocyptamus coeruleus and Platycheirus sp. (Diptera: Syrphidae) were found carrying pollinaria on their thorax. These are the first records of potential pollinators for the genus Corallorhiza in Mexico.

Salivary gland tumor incidence in adult patients in a tertiary hospital in Mexico from 2008 to 2019.

To determine the incidence of salivary gland tumors in a population of a tertiary hospital in the State of Mexico, and to describe demographic variables. An observational, cross-sectional and retrospective study of salivary gland tumors reported in a tertiary hospital in the State of Mexico in the period 2008-2019 is presented. A prevalence of 0.049% was found. There was no difference between sex in the studied population. Benign salivary gland tumors were the most frequent (86.7%). The age range most affected was 51-60 years. The most frequently found tumor was the pleomorphic adenoma, followed by Warthin's tumor. There was 13.33% of sialolipomas, and one myoepithelioma. There were no cases of sublingual gland tumors or minor salivary glands. Tumors of the major salivary glands are infrequent tumors; population cases from a central Mexican state and their demographic characteristics are presented to contribute to the information found in local and international literature.

Flavour, culture and food security: The spicy entanglements of chile pepper conservation in 21st century Mexico

Societal Impact StatementPolitical interests and power structures shape state‐led crop conservation and food policy. As a crop that relates to culture and belonging, the chile crop is ideal for exploring how food security policy and crop conservation schemes integrate aspects beyond staple crops, calories and/or electoral incentives. What do these schemes mean for the food and ingredients we love? Reflecting from this perspective can be useful to grasp, re‐frame and create more effective and inclusive food policies—ones that embody and valorise flavour, identities and territories beyond statements on paper.Summary In line with the Food and Agriculture Organisation's (FAO) international action plan for crop genetic resources, the Mexican state inaugurated the National System of Genetic Resources for Food and Agriculture (SINAREFI) in 2002. In this paper, I explore SINAREFI's interest in landraces and in situ conservation through the case of chile pepper, set under the Ministry of Agriculture's interests of promoting industrial agriculture and paternalistic food security welfare programmes. Through the analyses of existing literature on food security in Mexico state programmes, archival work and interviews, this article analyses how discourses on food security shape research trajectories, some of which are inevitably constrained by current market‐based agricultural systems. By exploring the state's chile research and conservation programme, this work demonstrates the complexity of international food security discourse and its application domestically. Particularly, this analysis highlights the limitations of state crop research and conservation efforts imposed by contradictory agricultural policies. In the case of chile, its link to Mexican culture and diet uncovers an important, but often overlooked, aspect of food security: flavour. In the case of chile, a non‐staple but culturally symbolic crop, welfare programmes remained paternalistic and focused on caloric intake despite the transformation of national discourse on food security towards the integration of landraces and local cultures through the inauguration of SINAREFI. This case study reflects on the limits of current framings and strategies regarding food security and the need to direct policies towards local food sovereignty to achieve the necessary stability for food security to endure.

Male flowers reveal the true identity of a new species of Hechtia (Bromeliaceae) from the Mexican state of Jalisco

A new species of Hechtia (Bromeliaceae, Hechtioideae) from the Mexican state of Jalisco and from the Pacific Lowlands biogeographical province is proposed as Hechtia carrilloi. Herbarium specimens of this new species were initially assigned to Hechtia santanae but after the study of living plants and fresh male flowers, we concluded that they differ in several features, including leaf surface (sparsely lepidote to glabrous vs. densely lepidote), flower size (4–5 mm long, 1–2 mm in diameter vs. 5–5.5 mm long, 3.8–4.2 mm in diameter), corolla shape (tubular vs. obconical), and anther color (maroon vs. reddish). A complete description based on female and male plants as well as fruits is provided. Likewise, photographs and illustrations showing diagnostic characters and habitat features are included. Additionally, an assessment of the conservation status of the new taxon based on the B criteria of the IUCN is presented.

Omicron and Delta variant prevalence detection and identification during the fourth COVID-19 wave in Mexico using wastewater-based epidemiology

ObjectivesTo identify the SARS-CoV-2 variants Delta and Omicron during the fourth wave of the COVID-19 pandemic in Mexico using samples taken from 19 locations in 18 out of the 32 states. MethodsThe genetic material concentration was done with PEG/NaCl precipitation, SARS-CoV-2 presence was confirmed by reverse transcriptase-quantitative polymerase chain reaction assay, the variant detection was carried out using a commercial mutation detection panel kit, and variant/mutation confirmation was done by amplicon sequencing of receptor-binding domain target region. The study used 41 samples. ResultsThe Delta variant was confirmed in two samples during August 2021 (Querétaro and CDMX) and in three samples during November 2021 (Aguascalientes, Ciudad Juárez campuses, and Nuevo Leon). In December 2021, another sample with the Delta variant was confirmed in Nuevo Leon. Between January to March 2022 only the presence of Omicron was confirmed, (variant BA.1). Additionally, in this period six samples were identified with the status “Variant Not Determined”. ConclusionTo our knowledge, this study is one of the first to identify Omicron and Delta variants with polymerase chain reaction in Mexico and Latin America and its distribution across the country with 56% Mexican states making it a viable alternative for variant detection without conducting a large quantity of sequencing of clinical tests.

Actions Applied by the Mexican Government to Boost Foreign Trade During the Pandemic and Post-Pandemic

ABSTRACT This research aims to analyze the different intervention strategies applied by the Mexican state in international trade during the pandemic to generate policy proposals that strengthen export and import activities in the post-pandemic transition. The methodology used was analytical and descriptive. The results show that the new National Customs Agency of Mexico and the designation of the armed forces in customs control have generated a better collection of taxes on foreign trade and an increase in exports of 2.1% in 2022 compared to 2021. These have allowed for the repositioning of the state’s role in international trade.

The Sonoran Land Grab: Development of Wealth in 19th century Sonora

In this article, we investigate the effect of encroachment policies on wealth in late 19th century conducted by the Mexican state in the state of Sonora. Using a novel database of will inventories from the Mexican state of Sonora, we find that the upper-class saw large wealth gains as a result of access to new agricultural land and irrigation. We argue that encroachment policies had a substantial effect on wealth but that this effect is heterogenous across social groups. We highlight the role of institutions in shaping wealth and inequality in the early periods of American economic development.

30 Analyzing Spanish Speakers Cordoba Naming Test Performance

Objective:A 30-item confrontation naming test was developed in Argentina for Spanish speakers, The Cordoba Naming Test (CNT). The Boston Naming Test is an established confrontation naming task in the United States. Researchers have used the Boston Naming Test to identify individuals with different clinical pathologies (e.g., Alzheimer’s disease). The current literature on how Spanish speakers across various countries perform on confrontational naming tasks is limited. To our knowledge, one study investigated CNT performance across three Spanish-speaking countries (i.e., Argentina, Mexico, and Guatemala). Investigators found that the Guatemalan group underperformed on the CNT compared to the Argentine and Mexican groups. The purpose of this study was to extend the current literature and investigate CNT performance across five Spanish-speaking countries (i.e., Argentina, Mexico, Guatemala, Colombia, United States). We predicted that the Argentine group would outperform the other Spanish-speaking countries.Participants and Methods:The present study sample consisted of 502 neurologically and psychologically healthy participants with a mean age of 29.06 (SD = 13.41) with 14.75 years of education completed (SD = 3.01). Participants were divided into five different groups based on their country of birth and current country residency (i.e., United States, Mexico, Guatemala, Argentina, & Colombia). All participants consented to voluntary participation and completed the CNT and a comprehensive background questionnaire in Spanish. The CNT consisted of 30 black and white line drawings, ranging from easy to hard in difficulty. An ANCOVA, controlling for gender, education, and age, was used to evaluate CNT performance between the five Spanish-speaking country groups. Meanwhile, a Bonferroni post-hoc test was utilized to evaluate the significant differences between Spanish-speaking groups. We used a threshold of p < .05 for statistical significance.Results:Results revealed significant group differences between the five Spanish speaking groups on the CNT, p = .000, np2 = .48. Bonferroni post-hoc test revealed that the United States group significantly underperformed on the CNT compared to all the Spanish-speaking groups. Next, we found the Guatemalan group underperformed on the CNT compared to the Argentinian, Mexican, and Colombian groups. Additionally, we found the Argentinian group outperformed the Mexican, Guatemalan, and United States groups on the CNT. No significant differences were found between the Argentinian group and Colombian group or the Mexican group and Colombian group on the CNT.Conclusions:As predicted, the Argentinian group outperformed all the Spanish-speaking groups on the CNT except the Colombian group. Additionally, we found that the United States group underperformed on the CNT compared to all the Spanish-speaking groups. A possible explanation is that Spanish is not the official language in the United States compared to the rest of the Spanish-speaking groups. Meanwhile, a possible reason why the Argentinian and Colombian groups demonstrated better CNT performances might have been that it was less culturally sensitive than the United States, Mexican, and Guatemalan groups. Further analysis is needed with bigger sample sizes across other Spanish-speaking countries (e.g., Costa Rica, Chile) to evaluate what variables, if any, are influencing CNT performance.

The institutional context, entrepreneurship decisions, and venture types: evidence from Mexico

Purpose The research aims to applying Baumol’s framework to address some research gaps in the literature. This paper aims to analyze how institutional variations at the subnational level impact entrepreneurship decisions and the path toward productive or unproductive entrepreneurship in an institutionally underdeveloped country. The results offer potentially new theoretical insights and practical implications for developing or emergent countries. Design/methodology/approach The research applies Baumol’s framework to Mexico’s context. The research collects data compounded by individual- and state-level variables from diverse sources for the 32 Mexican states. The individual level and some controls were obtained from sources of regular frequency, but the institutional variables were derived from surveys of irregular frequency, nonsynchronic and mostly nonoverlapping, which required aligning and centered them around 2016 and 2019 to match with the individual variables. The authors apply multilevel nonlinear mixed-effects probit regression to test nine hypotheses regarding the impact of institutional variables on entrepreneurial decisions and the path toward productive or unproductive entrepreneurship. Findings Improved formal institutions across the Mexican states reduce the entrepreneurship probability, implying interactions with other variables and indirect effects; encourage the selection of productive entrepreneurship, e.g. formal ventures; and discourage self-employment. Consequently, those institutions do not encourage entrepreneurship selection as an occupation but entrepreneurial quality, i.e. the selection of productive-formal entrepreneurship and larger ventures. Deficient informal institutions increase the entrepreneurship and formal entrepreneurship probabilities, implying the interactions with other variables and indirect effects and supporting the corruption “greases the wheels” hypothesis, consequently encouraging productive ventures. New evidence of the positive relationship between criminality and entrepreneurship types in Mexico is reported. Research limitations/implications Our findings indicate important impacts of the individual-level variables on the entrepreneurship decisions and that most of those decisions are potentially necessity driven and a minority are driven by opportunity, given their relationship with the macroeconomic controls and the institutional variables. The authors report mixed results on the relationship between institutions and entrepreneurship partially consistent with the literature; some results contribute additional evidence on controversial hypotheses or imply the existence of indirect effects. Overall, the results suggest that institutions impact the individual decisions to venture and the type of venture consequently affecting the amount and quality of entrepreneurship across states. Originality/value The research addresses some of the literature gaps by providing empirical evidence on a middle-income country and how diverging regional institutional contexts, including formal and informal institutions, impact the individual’s entrepreneurship decisions within an institutionally underdeveloped country. The paper contributes new knowledge and insights into entrepreneurship in emerging or developing countries with implications for Baumol’s framework in this context and adds to the debated hypothesis on the relationship between some institutions, e.g. corruption and criminality and entrepreneurship.

Cross-border utilization of cancer care by patients in the US and Mexico – a survey of Mexican oncologists

BackgroundThe US-Mexico border is the busiest in the world, with millions of people crossing it daily. However, little is known about cross-border utilization of cancer care, or about the reasons driving it. We designed a cross sectional online survey to understand the type of care patients with cancer who live in the US and Mexico seek outside their home country, the reasons why patients traveled across the border to receive care, and the barriers faced when seeking cross-border care.ResultsThe online survey was sent to the 248 cancer care providers working in the six Mexican border states who were registered members of the Mexican Society of Oncology. Responses were collected between September-November 2022. Sixty-six providers (response rate 26%) completed the survey. Fifty-nine (89%) reported interacting with US-based patients traveling to Mexico to receive various treatment modalities, with curative surgery (n = 38) and adjuvant chemotherapy (n = 31) being the most common. Forty-nine (74%) reported interacting with Mexico-based patients traveling to the US to receive various treatment modalities, with immunotherapy (n = 29) and curative surgery (n = 27) being the most common. The most frequently reported reason US-based patients sought care in Mexico was inadequate health insurance (n = 45). The most frequently reported reason Mexico-based patients sought care in the US was patients’ perception of superior healthcare (n = 38).ConclusionsMost Mexican oncologists working along the Mexico-US border have interacted with patients seeking or receiving binational cancer care. The type of care sought, as well as the reasons for seeking it, differ between US and Mexico-based patients. These patterns of cross-border healthcare utilization highlight unmet needs for patients with cancer in both countries and call for policy changes to improve outcomes in border regions.

Increase of catastrophic and impoverishing health expenditures in Mexico associated to policy changes and the COVID-19 pandemic.

In 2003, the Mexican Congress approved a major reform to provide health care services to the poor population through the public insurance scheme Seguro Popular. This program was dismantled in 2019 as part of a set of health system reforms and substituted with the Health Institute for Welfare (INSABI). These changes were implemented during the initial phases of the coronavirus (COVID-19) pandemic. We aimed to examine the impact of these reforms and the COVID-19 pandemic on financial risk protection in Mexico between 2018 and 2020. We performed a population-based analysis using cross-sectional data from the 2018 and 2020 rounds of the National Household Income and Expenditures Survey. We used a pooled fixed-effects multivariable two-stage probit model to determine the likelihood of catastrophic health expenditure (CHE), impoverishing health expenditure (IHE), and excessive health expenditure (EHE) among Mexican households. We also mapped the quintiles of changes in EHE in households without health insurance by state. The percentage of households without health insurance almost doubled from 8.8% (three million households) in 2018 to 16.5% (5.8 million households) in 2020. We also found large increases in the proportion of households incurring in CHE (18.4%; 95% confidence interval (CI) = 6.1, 30.7) and EHE (18.7%; 95% CI = 7.9, 29.5). Significant increases in CHE, IHE, and EHE were only observed among households without health insurance (CHE: 90.7%; 95% CI = 31.6, 149.7, EHE: 73.5%; 95% CI = 25.3, 121.8). Virtually all Mexican states (n/N = 31/32) registered an increase in EHE among households without health insurance. This increase has a systematic territorial component affecting mostly central and southern states (range = -1.0% to 194.4%). The discontinuation of the Seguro Popular Program and its substitution with INSABI during the first stages of the COVID-19 pandemic reduced the levels of health care coverage in Mexico. This reduction and the pandemic increased out-of-pocket expenditure in health and the portion of CHE and EHE in the 2018-2020 period. The effect was higher in households without health insurance and households in central and southern states of the country. Further studies are needed to determine the specific effect both of recent policy changes and of the COVID-19 pandemic on the levels of financial protection in health in Mexico.

Helminths of small rodents (Heteromyidae and Cricetidae) in the Yucatan Peninsula, Mexico: an integrative taxonomic approach to their inventory.

In this survey, we inventoried the helminths of heteromyid and cricetid rodents captured in the Yucatan Peninsula from 2017 to 2019. Helminths were identified using morphological techniques (clearing, staining, and scanning electron microscopy). Also, the 28S rRNA gene of individuals from several helminth taxa was successfully amplified and sequenced. To confirm the identification at the generic level, and in some cases at the specific level, and the genealogical relationships of the parasites, phylogenetic analyses were performed with the new 28S sequences. We identified 22 species of helminths including three trematodes (Brachylaimidae, Dicrocoeliidae, and Microphallidae), five cestodes (Davaineidae, Hymenolepididae, and Taeniidae), and 14 nematodes (Trichuridae, Ancylostomatidae, Ornithostrongylidae, Heligmonellidae, and Oxyuridae) from Heteromys gaumeri (Heteromyidae), Ototylomys phyllotis, Oligoryzomys fulvescens, Peromyscus yucatanicus, Sigmodon toltecus, and Reithrodontomys gracilis (Cricetidae). The overall frequency of infection in small rodents was 84.1% (143/170); all specimens of H. gaumeri, S. toltecus and Ol. fulvescens were infected with helminths. In total, we provided 46 new sequences of the 28S gene from 17 species of helminths. Seven species are likely undescribed species, six are reported for the first time in rodents from Mexico, and 12 are new host records in the Americas. Before this study, 87 taxa of helminths had been reported from 35 cricetid and 12 heteromyid species in 21 Mexican states. Our findings increase to 93 the helminth taxa in these rodents, and to 36 the cricetid species parasitized by helminths. This large scale-survey is the first to use an integrative approach to inventory the helminths of wild small rodents in Mexico.

Genomic epidemiology analysis of drug-resistant Mycobacterium tuberculosis distributed in Mexico.

Genomics has significantly revolutionized pathogen surveillance, particularly in epidemiological studies, the detection of drug-resistant strains, and disease control. Despite its potential, the representation of Latin American countries in the genomic catalogues of Mycobacterium tuberculosis (Mtb), the bacteria responsible for Tuberculosis (TB), remains limited. In this study, we present a whole genome sequencing (WGS)-based analysis of 85 Mtb clinical strains from 17 Mexican states, providing insights into local adaptations and drug resistance signatures in the region. Our results reveal that the Euro-American lineage (L4) accounts for 94% of our dataset, showing 4.1.2.1 (Haarlem, n = 32), and 4.1.1.3 (X-type, n = 34) sublineages as the most prevalent. We report the presence of the 4.1.1.3 sublineage, which is endemic to Mexico, in six additional locations beyond previous reports. Phenotypic drug resistance tests showed that 34 out of 85 Mtb samples were resistant, exhibiting a variety of resistance profiles to the first-line antibiotics tested. We observed high levels of discrepancy between phenotype and genotype associated with drug resistance in our dataset, including pyrazinamide-monoresistant Mtb strains lacking canonical variants of drug resistance. Expanding the Latin American Mtb genome databases will enhance our understanding of TB epidemiology and potentially provide new avenues for controlling the disease in the region.