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National Epidemiological Bulletin No. 778, SE 41, Year 2025
No. 778
Epidemiological Week 41
YEAR 2025
No. 740
From September 5 to October 11
Epidemiological Week 3
Publication Date
YEAR 2025
October 20, 2025
Excerpt:
II. About this National Epidemiological Bulletin (BEN) No. 778, corresponding to Epidemiological Week 41 of 2025, presents a comprehensive update of the country's epidemiological situation based on consolidated information from the National Health Surveillance System (SNVS 2.0), sentinel networks, and national programs.
This edition highlights two main themes.
On the one hand, the epidemiological update on whooping cough expands and deepens the analysis of the national situation, focusing on the recent evolution of the outbreak in Tierra del Fuego. The report presents the distribution of reported and confirmed cases, an analysis by region, jurisdiction, and age group, as well as vaccination coverage and updated recommendations for primary care health teams. The report also includes a specific section on epidemiological surveillance and diagnosis, along with preventive measures, early detection, and contact control, within the framework of the national response strategy to the increase in cases observed in 2025. Furthermore, it addresses the emerging situation of avian influenza, with a detailed description of the evolution of outbreaks reported in animals during the year and surveillance of the human-animal interface, in coordination with the competent national agencies. It includes background information, the international situation, and the prevention, surveillance, and control measures implemented in the country, as well as updated recommendations for the population and healthcare teams in the event of potential exposures. The edition is completed with updated tables of selected notifiable events, surveillance of acute respiratory infections and dengue and other arboviruses, highlighted jurisdictional bulletins, and a new set of surveillance tools, including the 8th edition of the guides for implementing health situation rooms and recent modifications to the SNVS 2.0 auxiliary coding.
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Page 39:
VI.3.B. CURRENT SITUATION OF HPAI OUTBREAKS IN ANIMALS (2025)
During 2025, the National Service for Agrifood Health and Quality (SENASA) has so far confirmed a total of 7 outbreaks of highly pathogenic avian influenza (HPAI) in Argentina in the provinces of Chaco, Buenos Aires, and Entre Ríos.
On February 14, 2025, an outbreak of H5 HPAI was confirmed in backyard poultry in the town of Tres Isletas, Maipú Department, Chaco Province. 20
More recently, on July 15 of this year, the detection of H5 HPAI was confirmed in backyard poultry in the Lezama district, Buenos Aires Province, affecting hens, roosters, ducks, pigeons, geese, and turkeys. The samples were analyzed by the Official Laboratory of the General Directorate of Laboratories and Technical Control of SENASA and were positive for H5 HPAI clade 2.3.4.4. 21
During the month of August, three outbreaks of HPAI in poultry were reported in the province of Buenos Aires.
The first was in the Navarro district, where H5 HPAI clade 2.3.4.4 was confirmed on August 1 in a backyard poultry establishment. Subsequently, on August 14, a new outbreak of HPAI H5, clade 2.3.4.4, was confirmed in a backyard poultry farm located in the Arrecifes district. On August 19, an outbreak of HPAI, subtype H5, clade 2.3.4.4, was confirmed in a laying hen poultry farm located in the town of Los Toldos, General Viamonte district.
Then, on September 1, an outbreak of HPAI H5 was confirmed in the province of Entre Ríos. This outbreak was detected in backyard poultry in the town of Laurencena, Nogoyá. 22
Additionally, on October 6, a suspected case of birds with cyanotic combs and wattles, and high mortality, was received. 23 A day later, on October 7, SENASA confirmed a case of HPAI H5 in backyard poultry in the town of San Andrés de Giles, province of Buenos Aires. The samples were analyzed by the Official SENASA Laboratory in Martínez.
In light of this detection, national and jurisdictional animal health and human health teams are identifying exposed individuals, conducting the corresponding epidemiological investigation, and implementing control measures.
-snip-
VI.3.C. CURRENT NATIONAL SURVEILLANCE SITUATION OF THE HUMAN-ANIMAL INTERFACE (2025)
... Below is the reported information on exposed individuals and suspected cases identified and studied to date, registered in the National Surveillance System. To date, a total of 51 exposed individuals have been recorded during 2025 (six remain under follow-up).
Table 1. Follow-up results of individuals exposed to HPAI by jurisdiction. Argentina. Year 2025. Argentina. Updated 10/14/2025.
Exposed Individuals
(chart at link)...So far, two suspected cases have been reported, which have been investigated and ruled out for influenza by the Respiratory Virus Service of the National Institute of Infectious Diseases, the National Reference Laboratory for Influenza and other respiratory viruses.
Continued: https://www.argentina.gob.ar/sites/d...-778-se-41.pdf
National Epidemiological Bulletin No. 778, SE 41, Year 2025
No. 778
Epidemiological Week 41
YEAR 2025
No. 740
From September 5 to October 11
Epidemiological Week 3
Publication Date
YEAR 2025
October 20, 2025
Excerpt:
II. About this National Epidemiological Bulletin (BEN) No. 778, corresponding to Epidemiological Week 41 of 2025, presents a comprehensive update of the country's epidemiological situation based on consolidated information from the National Health Surveillance System (SNVS 2.0), sentinel networks, and national programs.
This edition highlights two main themes.
On the one hand, the epidemiological update on whooping cough expands and deepens the analysis of the national situation, focusing on the recent evolution of the outbreak in Tierra del Fuego. The report presents the distribution of reported and confirmed cases, an analysis by region, jurisdiction, and age group, as well as vaccination coverage and updated recommendations for primary care health teams. The report also includes a specific section on epidemiological surveillance and diagnosis, along with preventive measures, early detection, and contact control, within the framework of the national response strategy to the increase in cases observed in 2025. Furthermore, it addresses the emerging situation of avian influenza, with a detailed description of the evolution of outbreaks reported in animals during the year and surveillance of the human-animal interface, in coordination with the competent national agencies. It includes background information, the international situation, and the prevention, surveillance, and control measures implemented in the country, as well as updated recommendations for the population and healthcare teams in the event of potential exposures. The edition is completed with updated tables of selected notifiable events, surveillance of acute respiratory infections and dengue and other arboviruses, highlighted jurisdictional bulletins, and a new set of surveillance tools, including the 8th edition of the guides for implementing health situation rooms and recent modifications to the SNVS 2.0 auxiliary coding.
-snip-
Page 39:
VI.3.B. CURRENT SITUATION OF HPAI OUTBREAKS IN ANIMALS (2025)
During 2025, the National Service for Agrifood Health and Quality (SENASA) has so far confirmed a total of 7 outbreaks of highly pathogenic avian influenza (HPAI) in Argentina in the provinces of Chaco, Buenos Aires, and Entre Ríos.
On February 14, 2025, an outbreak of H5 HPAI was confirmed in backyard poultry in the town of Tres Isletas, Maipú Department, Chaco Province. 20
More recently, on July 15 of this year, the detection of H5 HPAI was confirmed in backyard poultry in the Lezama district, Buenos Aires Province, affecting hens, roosters, ducks, pigeons, geese, and turkeys. The samples were analyzed by the Official Laboratory of the General Directorate of Laboratories and Technical Control of SENASA and were positive for H5 HPAI clade 2.3.4.4. 21
During the month of August, three outbreaks of HPAI in poultry were reported in the province of Buenos Aires.
The first was in the Navarro district, where H5 HPAI clade 2.3.4.4 was confirmed on August 1 in a backyard poultry establishment. Subsequently, on August 14, a new outbreak of HPAI H5, clade 2.3.4.4, was confirmed in a backyard poultry farm located in the Arrecifes district. On August 19, an outbreak of HPAI, subtype H5, clade 2.3.4.4, was confirmed in a laying hen poultry farm located in the town of Los Toldos, General Viamonte district.
Then, on September 1, an outbreak of HPAI H5 was confirmed in the province of Entre Ríos. This outbreak was detected in backyard poultry in the town of Laurencena, Nogoyá. 22
Additionally, on October 6, a suspected case of birds with cyanotic combs and wattles, and high mortality, was received. 23 A day later, on October 7, SENASA confirmed a case of HPAI H5 in backyard poultry in the town of San Andrés de Giles, province of Buenos Aires. The samples were analyzed by the Official SENASA Laboratory in Martínez.
In light of this detection, national and jurisdictional animal health and human health teams are identifying exposed individuals, conducting the corresponding epidemiological investigation, and implementing control measures.
-snip-
VI.3.C. CURRENT NATIONAL SURVEILLANCE SITUATION OF THE HUMAN-ANIMAL INTERFACE (2025)
... Below is the reported information on exposed individuals and suspected cases identified and studied to date, registered in the National Surveillance System. To date, a total of 51 exposed individuals have been recorded during 2025 (six remain under follow-up).
Table 1. Follow-up results of individuals exposed to HPAI by jurisdiction. Argentina. Year 2025. Argentina. Updated 10/14/2025.
Exposed Individuals
(chart at link)...So far, two suspected cases have been reported, which have been investigated and ruled out for influenza by the Respiratory Virus Service of the National Institute of Infectious Diseases, the National Reference Laboratory for Influenza and other respiratory viruses.
Continued: https://www.argentina.gob.ar/sites/d...-778-se-41.pdf