Publikationsdatenbank

Naturally acquired immunity to Plasmodium pitheci in Bornean orangutans ( Pongo pygmaeus ) (2024)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Sánchez, Karmele Llano

Baird, John Kevin

Nielsen, Aileen

Nurillah, Andini

Agustina, Fitria

Komara, Komara

Fadilah, Fina

Prameswari, Wendi

Nugraha, Raden Taufiq Purna

Saputra, Sugiyono

Nurkanto, Arif

Dharmayanthi, Anik Budhi

Pratama, Rahadian

Exploitasia, Indra

Greenwood, Alex D. (WE 12)

Quelle

Parasitology

Bandzählung: 151

Heftzählung: 4

Seiten: 380 – 389

ISSN: 0031-1820

Sprache

Englisch

Verweise

URL (Volltext): https://www.cambridge.org/core/product/identifier/S0031182024000155/type/journal_article

DOI: 10.1017/S0031182024000155

Pubmed: 38361461

Kontakt

Institut für Tierpathologie

Robert-von-Ostertag-Str. 15
14163 Berlin
+49 30 838 62450
pathologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Naturally acquired immunity to the different types of malaria in humans occurs in areas of endemic transmission and results in asymptomatic infection of peripheral blood. The current study examined the possibility of naturally acquired immunity in Bornean orangutans, Pongo pygmaeus, exposed to endemic Plasmodium pitheci malaria. A total of 2140 peripheral blood samples were collected between January 2017 and December 2022 from a cohort of 135 orangutans housed at a natural forested Rescue and Rehabilitation Centre in West Kalimantan, Indonesia. Each individual was observed for an average of 4.3 years during the study period. Blood samples were examined by microscopy and polymerase chain reaction for the presence of plasmodial parasites. Infection rates and parasitaemia levels were measured among age groups and all 20 documented clinical malaria cases were reviewed to estimate the incidence of illness and risk ratios among age groups. A case group of all 17 individuals that had experienced clinical malaria and a control group of 34 individuals having an event of >2000 parasites μL−1 blood but with no outward or clinical sign of illness were studied. Immature orangutans had higher-grade and more frequent parasitaemia events, but mature individuals were more likely to suffer from clinical malaria than juveniles. The case orangutans having patent clinical malaria were 256 times more likely to have had no parasitaemia event in the prior year relative to asymptomatic control orangutans. The findings are consistent with rapidly acquired immunity to P. pitheci illness among orangutans that wanes without re-exposure to the pathogen.