As of 14 December 2021, a total of 19 laboratory-confirmed human rabies cases has been reported in South Africa for 2021. The cases are from Eastern Cape, KwaZuluNatal and Limpopo provinces. In addition, four probable rabies cases were reported from KwaZulu-Natal and the Eastern Cape provinces. A pr...obable case of rabies is defined as a person who has had a history of contact with a suspected or confirmed rabid animal and has developed an acute encephalitis with hyperactivity and paralytic signs and symptoms that progressed and resulted in death, usually by cardiac or respiratory failure, typically within ten days.
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This review focusses on the interactions between the etiologic agent of Chagas disease, Trypanosoma cruzi, and its triatomine vector. The flagellate mainly colonizes the intestinal tract of the insect. The effect of triatomines on trypanosomes is indicated by susceptibility and refractoriness phenom...ena that vary according to the combination of the strains. Other effects are apparent in the different regions of the gut. In the stomach, the majority of ingested blood trypomastigotes are killed while the remaining transform to round stages. In the small intestine, these develop into epimastigotes, the main replicative stage. In the rectum, the population density is the highest and is where the infectious stage develops, the metacyclic trypomastigote. In all regions of the gut, starvation and feeding of the triatomine affect T. cruzi. In the small intestine and rectum, starvation reduces the population density and more spheromastigotes develop. In the rectum, feeding after short-term starvation induces metacyclogenesis and after long-term starvation the development of specific cells, containing several nuclei, kinetoplasts and flagella. When considering the effects of T. cruzi on triatomines, the flagellate seems to be of low pathogenicity. However, during stressful periods, which are normal in natural populations, effects occur often on the behaviour, eg, in readiness to approach the host, the period of time before defecation, dispersal and aggregation. In nymphs, the duration of the different instars and the mortality rates increase, but this seems to be induced by repeated infections or blood quality by the feeding on infected hosts. Starvation resistance is often reduced by infection. Longevity and reproduction of adults is reduced, but only after infection with some strains of T. cruzi. Only components of the surface coat of blood trypomastigotes induce an immune reaction. However, this seems to act against gut bacteria and favours the development of T. cruzi.
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Epidemiological Update
Dengue
7 February 2020
Situation summary
In the Region of the Americas, between epidemiological week (EW) 1 and EW 521 of 2019, a total of 3,139,335 cases of dengue have been reported (321.58 cases per 100,000 population), including 1,538 deaths. Of the total cases, 1,367,...353 (43.6%) were laboratory-confirmed and 28,169 (0.9%) were classified as severe dengue. The case-fatality rate was 0.049%.
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Since the notification of the first two confirmed cases of Vibrio cholerae O1 in the greater Port-au-Prince area on 2 October 2022, to 14 January 2023, the Haitian Ministry of Health (Ministère de la Santé Publique et de la Population, MSPP per its French acronym), reported a total of 24,232 suspe...cted cases in 10 departments of the country, including 1,742 confirmed cases, 20,505 hospitalized suspected cases, and 483 registered deaths. This represents an increase in the last 7 days of 5% in suspected cases (N=1,188), 11% in confirmed cases (N=166) and 4% in deaths (N=19). As of 14 January 2023, 9 departments have confirmed cases (Artibonite, Centre, Grand-Anse, Nippes, Nord, Nord-Ouest, Ouest, Sud and Sud-Est). To date, the case fatality rate among suspected cases is 2.0%.
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Find the latest statistics here
9 June 2022. This report presents an update of monkeypox confirmed cases in the European Union/European Economic Area (EU/EEA) and worldwide
Here you can find the latest reports
Die neuen Podcast-Folgen werden dienstags gegen 17 Uhr veröffentlicht. Neben Christian Drosten, dem Leiter der Virologie an der Berliner Charité, ist Sandra Ciesek, Direktorin des Instituts für Medizinische Virologie am Universitätsklinikum Frankfurt am Main, ein regelmäßiger Gesprächsgast.
...Seit Ende Februar 2020 beantwortet Prof. Dr. Christian Drosten (Leiter der Virologie an der Berliner Charité) Fragen zur aktuellen Situation, erklärt Zusammenhänge und schildert, wie er diese Monate persönlich erlebt. Anfang September kam Prof. Dr. Sandra Ciesek (Leiterin der Virologie des Universitätsklinikums Frankfurt) als Gesprächsgast dazu.
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In the Region of the Americas, between epidemiological week (EW) 1 and EW 52 of 2018, a total of 560,586 cases of dengue were reported (incidence rate of 57.3 cases per 100,000 population), including 336 deaths. Of the total cases, 209,192 (37.3%) were laboratoryconfirmed and 3,535 (0.63%) were clas...sified as severe dengue. Cases reported in 2018 were higher than the total reported in 2017 but lower than the historical average reported in the previous 11 years (2006-2016) (Figure 1). Similarly, the proportion of cases of severe dengue and dengue with warning signs reported in 2018 was higher than the previous two years, but lower than the preceding ten years, and it remains below 1% which was reached in 2015.
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Diphtheria in the Americas -Summary of the situation.
In 2018, three countries in the Region of the Americas (Colombia, Haiti, and the Bolivarian Republic of Venezuela) reported confirmed cases of diphtheria. In 2019, Haiti and Venezuela reported confirmed cases.
Flooding following Cyclone Idai in mid-March has now affected 270,000 people as of 30 March 2019.
• The most heavily affected areas are the districts of Chimanimani and Chipinge in Manicaland which have been isolated due to roads and bridges being washed away. Mashonaland East (Chikomba district)... and Masvingo (Zaka and Bikita districts) have also been affected.
• The flood response is being led by the Department of Civil Protection at the national and provincial levels.
• Two district command centres have been set up in Chimanimani and Chipinge. A logistics base has been set up in Mutare.
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More than 230,000 people displaced by Typhoon Mangkhut in Philippines
Access is still limited due to landslides in mountain areas. Some areas are still flooded, leaving people vulnerable to diseases including leptospirosis, dengue, acute gastroenteritis and AWD