Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Objective. To analyze, from the perspective of community health workers (CHW), the knowledge and experiences in mental health care (MH), in rural communities in Chiapas. Materials and methods. The descriptive phenomenological approach was used. Eighteen semi-structured interviews were conducted with CHW, which were audiorecorded, transcribed, codified and analyzed using qualitative content analysis with the help of Atlas ti. Results. Mental CHW have a broad understanding of the culture, language and problems of their communities, allowing them to act as liaisons between health services and the population. They identify that there is good MH when a “person is in the mood to do their daily work” and illness when “people are suffering or have wicked thoughts”. Their work experiences are linked to individual accompaniment (psycho-education) and the support of activities carried out by professionals of Compañeros En Salud (CES). Conclusion. The mental CHW who work with CES, develop an important role in the promotion of mental health, of risks and accompaniment of patients with mental disorders. These findings contribute to strengthen the evidence on the importance of developing community interventions in MH through these personnel, in contexts of scarce availability of health services.

Objective. To evaluate the presence of Elizabethkingia anophelis infection in Aedes albopictus wild populations of Southern Mexico. Materials and methods. Eight sites were selected to collect Aedes albopictus in the Soconusco region, Chiapas, females were analyzed to amplify the Gyrase B gene by PCR, the minimum infection rate of E. anopheliswas calculated and its species was determined by sequencing and phylogeny. Results. The presence of E. anophelis was only observed in Huehuetán with a minimum infection rate of 37.8%. Conclusion. A local strain of E. anophelis was detected for the first time in Ae. albopictus from Chiapas and this bacterium could be considered a candidate for study as a probable control agent or as a vehicle for transgenesis.

Objective. To analyze the differential expression of proteins of Ae. aegypti infected with Wolbachia and its association with the viral cycle of dengue virus (DENV). Materials and methods. We review a database of proteins from Ae. aegypti infected and uninfected with Wolbachia and we reviewed published articles in peer-reviewed journals that talk about participation in the protein and viral cycle of DENV. Results. We found proteins that expressed changes in Wolbachia infection, some increased and others decreased, which parti­cipate in the processes of entry, replication, and exit of DENV. Conclusions. There are changes in protein expression of Wolbachia-infected cells, which are necessary for the DENV replication cycle, explaining why some Wolbachia-infected mosquitoes are refractory to DENV infection.

Not available

Not available

Objective. To provide primary evidence of Trypanosoma cruzi landscape genetics in the Mexican Neotropics. Materials and methods. Trypanosoma cruzi and discrete typing units (DTU) prevalence were analyzed in landscape communities of vectors, wildlife, livestock, pets, and sympatric human populations using endpoint PCR and sequencing of all relevant amplicons from mitochondrial (kDNA) and nuclear (ME, 18S, 24Sα) gene markers. Results. Although 98% of the infected sample-set (N=2 963) contained single or mixed infections of DTUI (TcI, 96.2%) and TcVI (22.6%), TcIV and TcII were also identified. Sensitivity of individual markers varied and was dependent on host taxon; kDNA, ME and 18S combined identified 95% of infections. ME genotyped 90% of vector infections, but 60% of mammals (36% wildlife), while neither 18S nor 24Sα typed more than 20% of mammal infections. Conclusion. Available gene fragments to identify or genotype T. cruzi are not universally sensitive for all landscape parasite populations, highlighting important T. cruzi heteroge- neity among mammal reservoir taxa and triatomine species.

Not available

To describe the clinical progression and medical protocols applied in a 41 year old man who was bited by a bat three months before. The patient did not ask for medical care until acute tremor and pain in the right thoracic limb and hydro­phobia started. For a history of a wild animal bite associated with a unique clinical condition, we suspected of rabies encephalitis, confirming the diagnostic by pathology after his death. This case ocurred in Guadalajara, Jalisco, México, in April, 2022. The last case of human rabies reported in Jalisco secondary to bat bite was almost 30 years ago. As an uncomon disease, medical personnel and facilities should be prepared to attend this sort of cases after clinical suspicion. For the present case, the medical history was the key for diagnosis. Rabies is a disease caused by the neurotropic virus belonging to the Rhabdoviridae family whose prognosis is bleak, with mortality close to 100% and therapeutic options limited. This case emphasizes the high mortality of rabies virus infection and the importance of increasing awareness and education to the public in general, with regard to applying the vaccine as post-exposure prophylaxis.

Objective. To formalize and systematize the INSP/CRISP Biological Collection of Mosquitoes. Materials and methods. Three projects were carried out on the biodi­versity of culicids from the Southern, Central Western and Yucatan Peninsula. Results. The mosquito collection con­centrate 2 001 curatorial records that including 13 genera, 24 subgenera, and 79 species. The specimens are represen­tatives from 18 states, 205 municipalities and 594 localities. Publications on biodiversity, DNA barcoding sequences and distribution maps of vector mosquitoes in Mexico were generated. Conclusions. The mosquito collection was included in the SNIB Catalog of Collections and Institutions and serves as a reference for regional medical entomology.

Objective. Genetic and antigenic polymorphism of P. vivax apical membrane antigen-1 (pvama1I-II) from Nicaragua was examined. Materials and methods. Infected blood samples from patients were obtained during 2012-2013. A gene fragment comprising domains I-II was amplified and sequenced, and the genetic parameters, haplotype relationships, genetic structure, and amino acid variation in predicted B cell epitopes were analyzed. Results. 65 sequences of pvama1III had 19 nonsynonymous and five synonymous nucleotide changes. Nicaraguan parasites had low diversity, high linkage disequilibrium, and few recombination events. Neutrality tests indicate a positive and divergent selection, and three genetic clusters with loss of haplotypes were demonstrated. Amino acid variation predominated in predicted B cell epitopes and was closely related to that in Latin American parasites. Conclusions. Nicaraguan P. vivax is a moderately differentiated population under contraction and focalization processes, and the antigenic diversity resembles that of Latin American parasites. This information is relevant for vaccine development and epidemiological surveillance.