Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala

Triatoma nitida was found in 14 (0.4%) out of 3,726 houses located in six departments across Guatemala, which were surveyed from 1994 to 1998 by the man-hour collection method. Compared to previous information, the distribution of T. nitida in Guatemala has increased from five to nine departments; the species is present in mild climates at altitudes from 960 to 1,500 m. Fourteen percent of the intradomestic T. nitida were infected with Trypanosoma cruzi. The species was often found in conjunction with other triatomines (T. dimidiata and Rhodnius prolixus). The domestic and peridomestic presence of T. nitida in Guatemala was rare, but occasionally this species was colonizing human-made constructions. T. nitida appears to have a low importance as Chagas disease vector in Guatemala, as indicated by its scarce presence in the domestic habitats and defecation patterns. However, it clearly has potential to become a Chagas vector so we recommend an on-going study of the intradomestic presence of T. nitida following the control programs in Guatemala. Morphometric analysis of 47 T. nitida males from three localities showed quantitative differences between the populations, which indicates that geographic distance is an important factor in the structuring of T. nitida populations.

Influence of the blood meal source on the biology of Meccus picturatus Usinger 1939 (Hemiptera: Reduviidae: Triatominae) under laboratory conditions

Aspects related to hatching, time-lapse between presenting the blood meal and beginning of feeding, feeding time, postfeed defecation delay,life time, mortality and fecundity for each stage of Meccus picturatus, life-cycle were evaluated and compared in two cohorts of M. picturatus fed on hens or rabbits. The hatching rate observed for each of the two studied groups of eggs was 78.1% (n = 2298) on the group fed on hens and 82.1% (n = 2704) on that fed on rabbits, and the average time of hatching was 20 days. Mean time-lapse for beginning feeding was under 3 min in nymphal stages and postfeed defecation delay was under 10 min in all stages, in both cohorts. Mean feeding time was significantly (P < 0.05) shorter in triatomines fed on hens than on rabbits. A similar number of nymphs of each cohort, 69 fed on hens (34.5%) and 68 fed on rabbits (34%), completed the cycle. No significantly (P > 0.05) differences were recorded among the average times from NI to adult in the cohort fed on hens (196.8 ± 15.8 days) and the average time in the cohort fed on rabbits (189.5 ± 22.9). The average span in days for each stage fed on hens was not significantly different to the average span for each stage fed on rabbits. The number of blood meals at each nymphal stage varied from 1 to 6 in both cohorts. The mortality rates were higher on fifth nymphal stage, in both cohorts. No significant (P > 0.05) differences were recorded on mortality rates on most nymphal stages of both cohorts. The average number of eggs laid per female from the cohort fed on hens in a 9-month period was 791.1, whereas the average number of eggs in the cohort fed on rabbits was 928.3.

L'actitud de quatre escriptors catalans davant la Guerra civil (1936-1939) : Joan Sales, Pere Calders, Avel·lí Artís-Gener i Marià Manent

L'objectiu d'aquest treball és aclarir, fins on sigui possible, quines van ser les reaccions de quatre escriptors catalans en esclatar el conflicte, Pere Calders, Avel·lí Artís-Gener (

Feeding, defecation, and development times of Meccus longipennis Usinger, 1939 (Hemiptera: Reduviidae: Triatominae) under laboratory conditions

Aspects related to hatching, time-lapse between presenting the blood-meal and beginning of feeding, feeding time, postfeed defecation delay, mortality, and fecundity for each stage of Meccus longipennis life-cycle were evaluated. The bugs were maintained in a dark incubator at 27 ± 1ºC and 80 ± 5% rh, were fed weekly and checked daily for ecdysis or death. The hatching rate observed for 300 eggs was 76.7% and the average time of hatching was 19.8 days. Mean time-lapse between presentation of the blood meal and the beginning of feeding was under 5 min in nymphal stages and postfeed defecation delay was under 10 min in most stages, except in fourth and fifth stages. Mean feeding time was longer than 10 min in most stages, except in fourth stage. One hundred thirty-one nymphs (N) (65.5%) completed the cycle and the average time from NI to adult was 192.6 ± 34.8 days. The average span in days for each stage was 18.1 for NI, 21.4 for NII, 29.5 for NIII, 45.5 for NIV and 55.9 for NV. The number of bloodmeals at each nymphal stage varied from 1 to 5. The mortality rate was 3.29 for NI, 6.8 for NII, 2.92 for NIII 3.76 for NIV, and 10.16 for NV nymphs. The average number of eggs laid per female in a 9-month period was 615.6. Based on our results, we conclude that M. longipennis has some biological and behavioral characteristics which influence its capacity of becoming infected and transmitting Trypanosoma cruzi to human populations in those areas of Mexico where it is currently present.

Lutzomyia (Nyssomyia) whitmani s.l . (Antunes & Coutinho, 1939)(Diptera: Psychodidae: Phlebotominae): geographical distribution and the epidemiology of American cutaneous leishmaniasis in Brazil Mini-review

The aim of the present study, in view of the widespread geographical distribution of Lutzomyia (Nyssomyia) whitmani s.l. in Brazil, in close association with the regions of transmission of Leishmania (Viannia) braziliensis and L. (V.) shawi, is to investigate the distribution of this sand fly species and American cutaneous leishmaniasis (ACL) in relationship to vegetation and landscape ecology throughout Brazil. Thematic maps were elaborated by the MapInfo programme, giving information on the spatial distribution of L. whitmani s.l., in accordance with types of vegetation and foci of ACL. With regards to the known areas of transmission of ACL in Brazil, it is notable that L. (N.) whitmani s.l. occurs in most of them, where it has been implicated as a possible vector of L. (V.) braziliensis. The presence of L. whitmani s.l. has been registered in 26 states, the one exception being Santa Catarina; in some states such as Roraima, Acre, Tocantins, and Mato Grosso do Sul this sand fly species has been recorded in a large number of municipalities. L. whitmani s.l. has been found in association with a variety of vegetation types, including the Amazonian forest, savanna ("campos cerrados"), and northeastern savanna ("caatingas nordestinas" or "savana estépica").

Spatial modelling of Lutzomyia (Nyssomyia) whitmani s.l. (Antunes & Coutinho, 1939) (Diptera: Psychodidae: Phlebotominae) habitat suitability in the state of Mato Grosso, Brazil

Lutzomyia (Nyssomyia) whitmani s.l.is the main vector of cutaneous leishmaniasis in state of Mato Grosso, but little is known about environmental determinants of its spatial distribution on a regional scale. Entomologic surveys of this sand fly species, conducted between 1996 and 2001 in 41 state municipalities, were used to investigate the relationships between environmental factors and the presence of the species, and to develop a spatial model of habitat suitability. The relationship between averaged CDC light trap indexes and 15 environmental and socio-economic factors were tested by logistic regression (LR) analysis. Spatial layers of deforestation tax and the Brazilian index of gross net production (IGNP) were identified as significant explanatory variables for vector presence in the LR model, and these were then overlaid with habitat maps. The highest habitat suitability in 2001 was obtained for the heavily deforested areas in the Central-North, South, East, and Southwest of Mato Grosso, particularly in municipalities with lower IGNP values.

Art i guerra civil (1936-1939): l'exemple de Girona

Article on es fa un breu repàs a l'activitat plàstica desenvolupada a la ciutat de Girona en temps de La Guerra Civil (1936-1939) i on s' estableixen quinesvaren ser les manifestacions públiques, les notes que les caracteritzaren i llursprotagonistes principals

Pelai Negre: un hisendat gironí i la qüestio agrària (1921-1939)

Per a la burgesia agrària catalana la primera meitat del segle XX va significar l'era dels atacs a la propietat. La qüestió de la distribució de la propietat i la necessitat de reformar-la va convertir-se, durant la II República, en l'eix del debat polític i en una causa fonamental de la polarització experimentada per la societat catalana. L'agreujament dels conflictes socials del món rural i el posterior inici d'un procés de reforma agrària varen afectar fortament els interessos i els drets adquirits de la classe propietària, i aquesta va respondre de manera contundent. Malgrat l'aparent unitat de la dreta en la defensa de la distribució de la propietat vigent aleshores, no podem passar per alt l'existència de propostes d'actuació de caràcter prou divergent en el si d'aquest bloc político-social. En aquest sentit la figura i l'obra publicistica de Pelai Negre i Pastell (1895-1984) adquireix un valor peculiar en tant que el seu discurs, tot i vetllar per la salvaguarda d'aquests drets també proposa una línia transformació progressiva i conservadora coneguda com a Acció Social Agrària

Història de vida de Seis experiencias de educación Freinet en Cataluña antes de 1939, de Fernando Jiménez

Treball destinat a totes les persones interessades en la història de l’educació i la pràctica quotidiana del mètode Freinet. El centre d’interès és una publicació sobre experiències de mestres durant la Segona República Espanyola. Les sis experiències són el fruit de les entrevistes que en Fernando Jiménez va realitzar a alguns mestres que van tenir contacte amb la impremta escolar durant aquest període

Estudi del tractament de la teoria de l'evolució a La Vanguardia Española entre el 1939 i el 1978

Aquesta recerca pretén ser una primera aproximació a l’objectiu d’esbrinar si el tractament de la teoria de l’evolució als mitjans de comunicació a l’Espanya del franquisme i la transició pot ser un baròmetre a través del qual poder rastrejar l’estat de la societat espanyola i la seva evolució. Aquesta recerca serà restringida, com a primera prospecció, a l’anàlisi dels articles sobre teoria de l’evolució publicats a La Vanguardia Española entre els anys 1939 i 1978. En l’anàlisi s’ha tingut en compte tant articles que se centren en l’evolucionisme biològic, com aquells que hi fan referència en el tractament d’altres temes, com els que simplement l’esmenten en el seu discurs. D’aquesta manera es pretén aconseguir una visió àmplia de l’abast de l’apropiació del concepte d’evolució en la quotidianitat del discurs popular i de l’ús de la teoria com a instrument ideològic. L’estudi dels usos lingüístics, conceptuals i estratègics de la teoria en el discurs periodístic d’aquest període apunta un reflex entre les preocupacions i situació política de la societat del moment i el tractament de la teoria de l’evolució, resultat punt de partida que mereix ser estudiat i contrastat amb més profunditat per tal de poder-ne establir una generalitat.